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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.

A218644 Number of n X n arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..3 n X n array.

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%I A218644 #7 Jan 20 2024 16:46:22
%S A218644 4,16,610,82188,45453172,99181510254,817394844786996,
%T A218644 26269231937922520406
%N A218644 Number of n X n arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..3 n X n array.
%C A218644 Diagonal of A218651.
%e A218644 Some solutions for n=3
%e A218644 ..1..1..3....0..0..1....2..2..3....0..0..3....3..1..1....1..1..1....3..2..2
%e A218644 ..1..1..3....0..0..2....1..1..2....0..2..0....1..1..0....1..1..2....3..2..2
%e A218644 ..1..1..3....0..3..3....1..1..2....2..0..0....1..0..0....3..2..2....3..2..2
%Y A218644 Cf. A218651.
%K A218644 nonn
%O A218644 1,1
%A A218644 _R. H. Hardin_, Nov 03 2012

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