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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.

A204682 Number of n X 5 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..3 introduced in row major order.

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%I A204682 #9 Feb 01 2025 19:56:28
%S A204682 40,31168,12711292,5770321516,2579588216958,1155411237719424,
%T A204682 517329649988490420,231643442002878488571
%N A204682 Number of n X 5 0..3 arrays with no occurrence of three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..3 introduced in row major order.
%e A204682 Some solutions for n=5:
%e A204682 ..0..0..1..0..1....0..0..1..0..0....0..1..0..0..1....0..1..1..0..2
%e A204682 ..0..1..0..0..1....1..0..1..2..1....1..0..2..2..0....1..1..2..0..3
%e A204682 ..2..3..0..3..0....1..1..2..1..0....2..2..1..1..0....2..3..3..1..0
%e A204682 ..2..1..1..0..3....3..3..0..1..3....1..1..2..2..1....2..1..3..2..0
%e A204682 ..3..0..2..3..2....0..1..0..2..3....0..0..3..0..0....1..0..2..0..1
%Y A204682 Column 5 of A204685.
%K A204682 nonn,more
%O A204682 1,1
%A A204682 _R. H. Hardin_, Jan 18 2012

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