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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.

A216459 Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of an nX7 array with new integer colors introduced in row major order.

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%I A216459 #5 Jul 22 2025 23:32:04
%S A216459 5,52,17733,2711768,6423148007,3030359756694,22530453266592757,
%T A216459 22413340656366875404,380159173982235374080849,
%U A216459 663445132155786673512833428,21523865504501144083392978709171
%N A216459 Number of horizontal, diagonal and antidiagonal neighbor colorings of the even squares of an nX7 array with new integer colors introduced in row major order.
%C A216459 Column 7 of A216460
%e A216459 Some solutions for n=4
%e A216459 ..0..x..1..x..2..x..3....0..x..1..x..2..x..3....0..x..1..x..2..x..3
%e A216459 ..x..2..x..3..x..0..x....x..2..x..0..x..4..x....x..2..x..0..x..4..x
%e A216459 ..0..x..4..x..5..x..3....0..x..1..x..2..x..1....0..x..5..x..6..x..7
%e A216459 ..x..5..x..0..x..2..x....x..5..x..4..x..6..x....x..4..x..1..x..0..x
%K A216459 nonn
%O A216459 1,1
%A A216459 _R. H. Hardin_ Sep 07 2012

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