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A238316 Number of (n+1)X(n+1) 0..2 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors.

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%I A238316 #6 Jul 23 2025 10:51:30
%S A238316 3,67,4294,721939,459256128,1266938409578,13394202897232848,
%T A238316 504070949140994691397
%N A238316 Number of (n+1)X(n+1) 0..2 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors.
%C A238316 Diagonal of A238323
%e A238316 Some solutions for n=3
%e A238316 ..0..1..1..0....0..2..2..2....0..0..0..0....1..1..2..2....2..2..2..0
%e A238316 ..0..0..0..0....0..1..1..0....0..0..0..0....1..1..2..2....0..2..2..0
%e A238316 ..0..0..0..0....1..1..1..0....0..0..1..1....0..1..1..1....0..0..2..2
%e A238316 ..1..1..0..0....2..2..2..2....0..2..2..1....0..1..1..1....0..0..2..2
%K A238316 nonn
%O A238316 1,1
%A A238316 _R. H. Hardin_, Feb 24 2014

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