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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.

A247158 Number of binary n X n matrices in which each row or column sum is at most n/2.

Table of values

n a(n)
0 1
1 1
2 7
3 34
4 7343
5 304186
6 1709852332
7 702998475376
8 94473463102448047
9 417235486592360297626
10 1273060578884483984898786092
11 63478599188626680785194983697744
12 4243780803142765740205701619107014789924

List of values

[1, 1, 7, 34, 7343, 304186, 1709852332, 702998475376, 94473463102448047, 417235486592360297626, 1273060578884483984898786092, 63478599188626680785194983697744, 4243780803142765740205701619107014789924]

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

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