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A221289 Equals two maps: number of nX6 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 nX6 array.

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%I A221289 #5 Jul 23 2025 01:49:09
%S A221289 12,792,48298,2890017,172905144,10344276279,618825190371,
%T A221289 37018574118868,2214457259485909,132469006243923162,
%U A221289 7924304243009714341,474032340904538992523,28356641623302251544461
%N A221289 Equals two maps: number of nX6 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..3 nX6 array.
%C A221289 Column 6 of A221290
%e A221289 Some solutions for n=3
%e A221289 ..0..0..0..1..0..0....0..0..0..0..1..1....0..0..0..1..0..0....0..0..1..0..0..1
%e A221289 ..1..1..0..0..1..0....1..0..0..0..0..0....0..0..1..1..0..1....1..0..1..0..1..0
%e A221289 ..0..0..1..1..0..0....1..1..1..0..1..0....1..0..1..0..1..0....1..0..1..1..0..0
%K A221289 nonn
%O A221289 1,1
%A A221289 _R. H. Hardin_ Jan 09 2013

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