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.

A116540 Number of zero-one matrices with n ones and no zero rows or columns, up to permutation of rows.

Table of values

n a(n)
0 1
1 1
2 3
3 10
4 41
5 192
6 1025
7 6087
8 39754
9 282241
10 2159916
11 17691161
12 154192692
13 1423127819
14 13851559475
15 141670442163
16 1517880400352
17 16989834719706
18 198191448685735
19 2404300796114642
20 30273340418567819
21 394948562421362392
22 5330161943597341380
23 74307324695105372519

List of values

[1, 1, 3, 10, 41, 192, 1025, 6087, 39754, 282241, 2159916, 17691161, 154192692, 1423127819, 13851559475, 141670442163, 1517880400352, 16989834719706, 198191448685735, 2404300796114642, 30273340418567819, 394948562421362392, 5330161943597341380, 74307324695105372519]

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

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