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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.

A213703 Half the number of 8X8 0..n symmetric arrays with no 2X2 subblock summing to 2n.

Table of values

n a(n)
1 1220409
2 109492322533385
3 22678299640600736258
4 181744271406372884215557
5 251417716503635583550380605
6 100056407652480771734417515110

List of values

[1220409, 109492322533385, 22678299640600736258, 181744271406372884215557, 251417716503635583550380605, 100056407652480771734417515110]

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

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