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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.

A220380 Majority value maps: number of n X n binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 n X n array.

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%I A220380 #7 Jul 23 2025 01:06:17
%S A220380 1,7,136,7462,1829169,1509240923,4230913273170
%N A220380 Majority value maps: number of n X n binary arrays indicating the locations of corresponding elements equal to at least half of their horizontal and antidiagonal neighbors in a random 0..1 n X n array.
%C A220380 Diagonal of A220386
%e A220380 Some solutions for n=3
%e A220380 ..1..0..0....1..1..1....1..1..1....0..0..1....1..0..0....1..0..1....1..1..1
%e A220380 ..0..0..1....0..1..1....0..1..1....1..0..1....0..0..0....1..1..0....1..0..0
%e A220380 ..1..1..0....1..0..1....0..0..0....1..1..1....1..1..1....1..1..1....1..1..1
%K A220380 nonn
%O A220380 1,2
%A A220380 _R. H. Hardin_ Dec 13 2012

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