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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.

A181252 Number of n X 9 binary matrices with no 2 X 2 block having four 1's.

Table of values

n a(n)
1 512
2 169209
3 61986457
4 22161786304
5 7969215344753
6 2861765993703849
7 1027999596778673856
8 369248337357375835969
9 132633131268024896655873
10 47641303155727829675539968
11 17112587585474467714330327353

List of values

[512, 169209, 61986457, 22161786304, 7969215344753, 2861765993703849, 1027999596778673856, 369248337357375835969, 132633131268024896655873, 47641303155727829675539968, 17112587585474467714330327353]

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

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