cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A347630 Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) is the number of partitions of n^k into distinct odd parts.

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 1, 5, 14, 5, 1, 1, 1, 1, 23, 833, 276, 12, 1, 1, 1, 1, 276, 1731778, 2824974, 9912, 33, 1, 1, 1, 1, 11564, 1741020966255, 824068326214949, 150145281903, 602245, 93, 2, 1, 1, 1, 2824974, 78444810948209793568790, 195321031346209256918890884699755, 7375247711025022789604527681, 116880108216597935, 57638873, 276, 2, 1
Offset: 0

Views

Author

Seiichi Manyama, Sep 09 2021

Keywords

Examples

			Square array begins:
  1, 1,  1,    1,            1,                            1, ...
  1, 1,  1,    1,            1,                            1, ...
  1, 0,  1,    2,            5,                           23, ...
  1, 1,  2,   14,          833,                      1731778, ...
  1, 1,  5,  276,      2824974,              824068326214949, ...
  1, 1, 12, 9912, 150145281903, 7375247711025022789604527681, ...
		

Crossrefs

Columns k=0..2 give A000012, A000700, A281489.
Main diagonal gives A347626.
Cf. A347621.

Programs

  • PARI
    T(n, k) = polcoef(prod(j=0, n^k\2, 1+x^(2*j+1)+x*O(x^(n^k))), n^k);

Formula

T(n,k) = A000700(n^k).

A347654 Number of partitions of 10^n into distinct odd parts.

Original entry on oeis.org

1, 2, 2574, 517035762467311, 11296895312655297284351876487257601933458562000884410
Offset: 0

Views

Author

Seiichi Manyama, Sep 10 2021

Keywords

Comments

The next term a(5) = 5.5425352720...*10^171 is too large to include.

Crossrefs

Programs

  • PARI
    a(n) = polcoef(prod(k=0, 10^n\2, 1+x^(2*k+1)+x*O(x^(10^n))), 10^n);

Formula

a(n) = A000700(10^n).
Showing 1-2 of 2 results.