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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.

A216611 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of an nX7 array with new integer colors introduced in row major order.

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%I A216611 #5 Jul 22 2025 23:33:15
%S A216611 2,52,2847,2711768,732209051,3030359756694,2043835395791757,
%T A216611 22413340656366875404,28985266574404467248885,
%U A216611 663445132155786673512833428,1425339594540323247000177579385
%N A216611 Number of horizontal, diagonal and antidiagonal neighbor colorings of the odd squares of an nX7 array with new integer colors introduced in row major order.
%C A216611 Column 7 of A216612
%e A216611 Some solutions for n=4
%e A216611 ..x..0..x..1..x..2..x....x..0..x..1..x..2..x....x..0..x..1..x..2..x
%e A216611 ..1..x..2..x..3..x..4....1..x..2..x..3..x..1....1..x..2..x..3..x..4
%e A216611 ..x..4..x..5..x..2..x....x..0..x..4..x..2..x....x..5..x..6..x..5..x
%e A216611 ..0..x..6..x..4..x..3....5..x..2..x..5..x..0....0..x..2..x..1..x..7
%K A216611 nonn
%O A216611 1,1
%A A216611 _R. H. Hardin_ Sep 10 2012

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