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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.

A208351 Number of nX6 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors).

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%I A208351 #6 Jun 02 2025 07:44:14
%S A208351 187,69988,1901508,103672036,8045978096,647640659639,52428246114853
%N A208351 Number of nX6 0..3 arrays with new values 0..3 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors).
%C A208351 Column 6 of A208353
%e A208351 Some solutions for n=4
%e A208351 ..0..1..0..2..1..0....0..0..0..0..0..0....0..0..0..0..1..1....0..0..0..0..1..1
%e A208351 ..1..0..2..2..1..0....1..2..1..1..1..3....2..1..2..2..1..1....1..1..2..2..2..3
%e A208351 ..3..1..0..2..3..3....2..3..3..1..2..3....3..3..3..2..3..3....1..3..3..2..3..3
%e A208351 ..1..0..1..0..3..0....0..2..0..0..2..0....0..0..0..0..0..3....2..3..0..0..0..1
%K A208351 nonn
%O A208351 1,1
%A A208351 _R. H. Hardin_ Feb 25 2012

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