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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.

A229365 Number of n X n 0..2 arrays avoiding 11 horizontally, 22 vertically and 00 antidiagonally.

Table of values

n a(n)
1 3
2 38
3 1610
4 222990
5 104382552
6 162794962814
7 851668326534130
8 14897378230939391994
9 872764112558460116016396
10 171094770747292212524499798502
11 112292092887713869652391305250607824

List of values

[3, 38, 1610, 222990, 104382552, 162794962814, 851668326534130, 14897378230939391994, 872764112558460116016396, 171094770747292212524499798502, 112292092887713869652391305250607824]

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

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