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.

A333891 Number of nonequivalent n X n binary matrices with an equal number of ones in every row and column up to permutation of rows.

Table of values

n a(n)
0 1
1 2
2 3
3 4
4 10
5 48
6 814
7 35048
8 4749917
9 1991695464
10 2744917591408
11 12259363447566918
12 187472413992607944600
13 9519583446974164009046934
14 1702816871202402787766029201942
15 1029212386646920125804443494952269006
16 2240000312861150532290111516186650669871299

List of values

[1, 2, 3, 4, 10, 48, 814, 35048, 4749917, 1991695464, 2744917591408, 12259363447566918, 187472413992607944600, 9519583446974164009046934, 1702816871202402787766029201942, 1029212386646920125804443494952269006, 2240000312861150532290111516186650669871299]

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

Content is available under The OEIS End-User License Agreement.