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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.

A217998 Number of nX5 arrays of the minimum or maximum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 nX5 array.

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%I A217998 #5 Jul 22 2025 23:46:25
%S A217998 241,59049,14345273,3486751263,847279307713
%N A217998 Number of nX5 arrays of the minimum or maximum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 nX5 array.
%C A217998 Column 5 of A217999
%e A217998 Some solutions for n=3
%e A217998 ..0..0..0..0..1....0..1..2..0..2....0..2..2..1..1....0..0..1..1..0
%e A217998 ..0..0..0..1..1....0..0..2..1..1....0..0..0..0..2....0..0..0..1..1
%e A217998 ..0..2..2..0..1....0..0..0..2..0....0..1..0..2..0....0..1..0..2..2
%K A217998 nonn
%O A217998 1,1
%A A217998 _R. H. Hardin_ Oct 17 2012