cp's OEIS Frontend

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.

A217642 Number of nX5 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..2 nX5 array.

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%I A217642 #6 Jul 22 2025 23:42:21
%S A217642 37,293,5119,80653,1348399,22516459,374406369,6249355897,104219396757,
%T A217642 1738366122579,28998563675605,483717812615381,8068980243223419,
%U A217642 134599543257146021,2245271881774026885,37453685830252207957
%N A217642 Number of nX5 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..2 nX5 array.
%C A217642 Column 5 of A217645
%H A217642 R. H. Hardin, <a href="/A217642/b217642.txt">Table of n, a(n) for n = 1..21</a>
%e A217642 Some solutions for n=3
%e A217642 ..2..1..0..0..1....2..2..0..0..2....2..2..2..1..1....1..1..0..0..0
%e A217642 ..1..0..0..0..1....1..0..0..0..2....2..2..1..1..1....1..1..0..0..0
%e A217642 ..0..0..0..0..1....0..0..0..0..2....2..2..1..1..1....2..2..2..2..2
%K A217642 nonn
%O A217642 1,1
%A A217642 _R. H. Hardin_ Oct 09 2012