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.

A208307 Number of 7 X n nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal or antidiagonal neighbor (colorings ignoring permutations of colors).

Table of values

n a(n)
0 1
1 877
2 27644437
3 27700815674032
4 196551307092757144384
5 5737167377815628378510929822
6 510275358863420934339418249390485008
7 114130286115375064054502412158789812265958284
8 56140177561453730943968268473396800731088097525712216

List of values

[1, 877, 27644437, 27700815674032, 196551307092757144384, 5737167377815628378510929822, 510275358863420934339418249390485008, 114130286115375064054502412158789812265958284, 56140177561453730943968268473396800731088097525712216]

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

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