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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.

A216341 Number of horizontal and antidiagonal neighbor colorings of the even squares of a 5Xn array with new integer colors introduced in row major order.

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%I A216341 #5 Jul 22 2025 23:31:17
%S A216341 5,27,877,15144,2387180,87852160,33093354906,2004646634218,
%T A216341 1404640885994156,123560104158582188,140585911310274456089
%N A216341 Number of horizontal and antidiagonal neighbor colorings of the even squares of a 5Xn array with new integer colors introduced in row major order.
%C A216341 Row 5 of A216338
%e A216341 Some solutions for n=4
%e A216341 ..0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x....0..x..1..x
%e A216341 ..x..2..x..3....x..2..x..3....x..2..x..3....x..2..x..0....x..2..x..3
%e A216341 ..3..x..4..x....1..x..4..x....1..x..4..x....1..x..3..x....4..x..1..x
%e A216341 ..x..3..x..1....x..1..x..0....x..5..x..3....x..0..x..1....x..5..x..2
%e A216341 ..4..x..2..x....2..x..1..x....4..x..2..x....3..x..2..x....2..x..4..x
%K A216341 nonn
%O A216341 1,1
%A A216341 _R. H. Hardin_ Sep 04 2012

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