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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.

A217957 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..2 n X n array.

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%I A217957 #7 Jul 22 2025 23:44:07
%S A217957 3,17,835,93765,48942485,87208470529,607719550822787,
%T A217957 15846548046182210151,1544189902342193283030363,
%U A217957 568409335593102223136171917295
%N A217957 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random 0..2 n X n array.
%C A217957 Diagonal of A217964
%e A217957 Some solutions for n=3
%e A217957 ..0..0..2....0..0..0....2..1..1....0..0..0....0..0..0....1..1..1....1..1..1
%e A217957 ..2..2..1....1..0..1....2..0..1....1..0..2....0..1..1....1..1..2....2..0..2
%e A217957 ..1..1..1....1..1..1....0..0..1....0..0..1....2..0..0....2..0..0....0..0..2
%K A217957 nonn
%O A217957 1,1
%A A217957 _R. H. Hardin_ Oct 16 2012

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