Concert Concat 2025

This post is one in a sequence which lists (mostly) live music I have heard, as best as memory allows. I write to have a record of my musical experiences and so these entries are intended as postcards from me to my future self. All opinions are personal.

Other posts in this collection can be found here. The most recent prior post in this sequence is here.

  • The Piccadilly Sinfonietta and Christina Lawrie on piano in an early evening concert at St Mary-le-Strand Church, Strand, London on Friday 19 September 2025. The programme comprised Holst’s St Paul’s Suite in C major (Op. 29, No. 2) and Beethoven’s First Piano Concerto. The Sinfonietta had 7 musicians (two first and two second violins, a viola, a cello and a double bass), six of whom stood. There were about 50 people in the audience. The playing from all eight performers was excellent. I do love the final movement of the Beethoven.
  • Claudia Jablonski in a lunchtime cello recital with Rustam Khanmurzin on piano at St Bride’s Church, Fleet Street, London on Friday 19 September 2025. About 35 people were present. The programme comprised the Cello Sonatas of Debussy and Prokofiev, neither of which I had heard before.

    This was a superb recital. The Prokofiev Sonata began with low rumblings on the cello, and then the piano entered with a lyrical and pleasing melodic phrase. I relaxed into a reverie, only to be jolted out by the very next phrase from the piano. The theme went stumbling spikily into some strange key! I thought, Hello Prokofiev, my old friend!

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The Year 2025

The year 2025 is a square number, since 2025 = 45 * 45. The adjacent years which are also squares are 1936 = 44 * 44 and 2116 = 46 * 46. There will be people who are alive for two of these three years, but nobody for all three (unless human lifespans increase dramatically for people born before 1937).

A Harshad number (aka a Niven number) is a number which is evenly divisible by the sum of its digits, eg, the number 24 is evenly divisible by 6, the sum of 2 + 4. The number 2025 is evenly divisible by 9 (the sum of 2 + 0 + 2 + 5), so it is a Harshad number. Likewise, the past three years are all evenly divisible by the sum of their respective digits: 2022, 2023 and 2024.

A sequence of four Harshad years in a row like this (2022, 2023, 2024, 2025) is quite rare. The last time this happened was a millenium ago, in the year 1014, and the next time it will happen will be in the year 3030, a millenium ahead of us.

I feel privileged to be alive at this particular time to witness this sequence!

The sequence of numbers which begin four Harshad numbers in a row are shown at the Online Encyclopedia of Integer Sequences here.

Recent Reading 21

The latest in a sequence of lists of recently-read books, listed in reverse chronological order.

  • Kate Conger [2024]: Character Limit: How Elon Musk Destroyed Twitter. Penguin.
  • Sarah Wynn-Williams [2025]: Careless People: A story of where I used to work. Power. Greed. Madness. Macmillan. This is a mostly riveting account of the author’s time working in a public policy role for Facebook/Meta. The company has denounced the many accusations of atrocious behaviours as out-of-date, which they don’t seem to have realized is not a rebuttal. Having myself worked with senior executives of major American companies, the allegations of US-centredness and gross ignorance of other countries and cultures, are all, sadly, very familiar.
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