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.

A122400 Number of square (0,1)-matrices without zero rows and with exactly n entries equal to 1.

Table of values

n a(n)
0 1
1 1
2 4
3 31
4 338
5 4769
6 82467
7 1687989
8 39905269
9 1069863695
10 32071995198
11 1062991989013
12 38596477083550
13 1523554760656205
14 64961391010251904
15 2975343608212835855
16 145687881987604377815
17 7594435556630244257213

List of values

[1, 1, 4, 31, 338, 4769, 82467, 1687989, 39905269, 1069863695, 32071995198, 1062991989013, 38596477083550, 1523554760656205, 64961391010251904, 2975343608212835855, 145687881987604377815, 7594435556630244257213]

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

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