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.

A333681 Number of non-isomorphic n X n binary matrices with all row and column sums equal up to permutation of rows and columns.

Table of values

n a(n)
0 1
1 2
2 3
3 4
4 6
5 8
6 19
7 44
8 314
9 7526
10 846993
11 324127860
12 403254094632
13 1555631972009430
14 19731915624463099553
15 791773335030637885025288
16 107432353216118868234728540268
17 47049030539260648478475949282317452
18 71364337698829887974206671525372672234855

List of values

[1, 2, 3, 4, 6, 8, 19, 44, 314, 7526, 846993, 324127860, 403254094632, 1555631972009430, 19731915624463099553, 791773335030637885025288, 107432353216118868234728540268, 47049030539260648478475949282317452, 71364337698829887974206671525372672234855]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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