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 A202888 Number of nX7 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor. 1

%I #8 Jul 19 2023 09:40:09

%S 292,701275,922352267,1137589582096,1452080571954205,

%T 1855037301620277541,2365289879500027706428,3016217753359820252116493,

%U 3846628606342304091797101743,4905606162973199116333144693744

%N Number of nX7 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

%H R. H. Hardin, <a href="/A202888/b202888.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

%e ..0..0..0..1..1..0..2....0..1..1..2..1..1..0....0..0..2..2..0..2..2

%e ..0..1..1..0..1..2..2....0..0..0..2..0..1..0....0..1..2..2..0..1..2

%Y Column 7 of A202889.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 25 2011

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Last modified May 28 15:51 EDT 2024. Contains 372916 sequences. (Running on oeis4.)