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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.

A217449 Number of n X n arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 n X n array.

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%I A217449 #7 Jul 22 2025 23:39:49
%S A217449 3,15,613,60821,28176327,45755747495,283827195520911
%N A217449 Number of n X n arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 n X n array.
%C A217449 Diagonal of A217457
%e A217449 Some solutions for n=3
%e A217449 ..1..1..1....2..1..1....0..0..0....1..1..2....1..1..1....0..0..0....2..0..0
%e A217449 ..1..1..0....1..2..1....1..0..0....1..2..0....1..2..0....0..0..0....0..0..0
%e A217449 ..2..0..0....1..1..1....1..1..2....1..0..0....2..0..0....1..0..1....1..0..1
%K A217449 nonn
%O A217449 1,1
%A A217449 _R. H. Hardin_ Oct 03 2012

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