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A238284 Number of (n+1)X(4+1) 0..3 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors.

%I A238284 #6 Jul 23 2025 10:49:50
%S A238284 144,13948,737366,27913368,1058583000,44441926832,1931022884277,
%T A238284 82508389421874,3470891253761820,145872518046542058,
%U A238284 6155861335428543193,260232903353528638680,10995149731230961462745,464237140754455444786421
%N A238284 Number of (n+1)X(4+1) 0..3 arrays with no element greater than all horizontal neighbors or less than all vertical neighbors.
%C A238284 Column 4 of A238287
%H A238284 R. H. Hardin, <a href="/A238284/b238284.txt">Table of n, a(n) for n = 1..210</a>
%e A238284 Some solutions for n=2
%e A238284 ..0..1..3..3..3....1..3..3..3..3....0..2..3..3..3....0..0..2..2..0
%e A238284 ..0..1..1..3..3....0..2..2..2..1....0..1..2..2..2....0..0..0..0..0
%e A238284 ..1..1..1..3..3....0..2..2..2..1....1..1..2..2..2....1..1..0..0..0
%K A238284 nonn
%O A238284 1,1
%A A238284 _R. H. Hardin_, Feb 22 2014