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.

A140314 Number of n X n binary matrices containing no more than two 1's in any 2 X 2 subblock.

Table of values

n a(n)
0 1
1 2
2 11
3 195
4 8969
5 1232795
6 471487297
7 516844071813
8 1603508113421239
9 14148460147460008963
10 354360105981877906958557
11 25210728065407321182797745205
12 5093486498660018140333056634922039

List of values

[1, 2, 11, 195, 8969, 1232795, 471487297, 516844071813, 1603508113421239, 14148460147460008963, 354360105981877906958557, 25210728065407321182797745205, 5093486498660018140333056634922039]

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

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