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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.

A209590 Number of n X n 0..5 arrays with every element equal to a diagonal or antidiagonal reflection.

Table of values

n a(n)
1 6
2 1296
3 513216
4 7316407296
5 191221621088256
6 179919658395455717376
7 310357092660359621536382976
8 19272907305680273946696375374708736
9 2194189968466526991277450769351996054962176

List of values

[6, 1296, 513216, 7316407296, 191221621088256, 179919658395455717376, 310357092660359621536382976, 19272907305680273946696375374708736, 2194189968466526991277450769351996054962176]

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

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