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# User:Jon Perry

### From OeisWiki

Studied Maths at Oxford University.

Some of my favourite sequences:

- A211172 - A de-diagonalized Sudoku torus.
- A215056 - Analysis of Minkowski 50-space zeroes.
- A209245 - A 3d recurrence.
- A209288 - A 4d recurrence.
- A003121 - Ballot numbers, or dominated words.
- A211347 - Sigma numbers.
- A001845 - Centered octahedral numbers.
- A214366 - Xylophone numbers.
- A181482 - Variation of the triangular numbers.
- A214832 - Piano key frequencies.
- A216151 - A fast growing nested pair of sequences.
- A217716 - Binomial word counter.
- A216196 - A diagonalized Sukoku torus.
- A224067 - The complex Collatz function z :-> 3iz + 1 + i.
- A217757 - Product (i!+1).
- A217716 - Product (binomial(n,k)+1)
- A213172 - A 3 dimensional walk.
- A002415 - 4 dimensional pyramidal numbers.
- A220096 - An extension of Fermat's brain.
- A066272 - Number of anti-divisors of n. (big cached site in link).
- A011379 - Stable brick structures.
- A225879 - Elastic numbers.
- A080670 - Literal Factorization.
- A230583 - Dirichlet's Divisor Sum Formula.
- A231155 - n integers contain a summable subset divisible by n.
- A234459 and A234460 - Complex factorials.
- A033455 - Complex 5-plex.