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A202887 Number of nX6 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor. 1

%I #8 Jul 19 2023 09:40:04

%S 121,96941,45332961,19914296913,9024909392725,4095290003129296,

%T 1855037301620277541,840314045399310110892,380686256792369384392819,

%U 172460622525800448862240139,78128840457226148615810468318

%N Number of nX6 0..2 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor.

%H R. H. Hardin, <a href="/A202887/b202887.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

%Y Column 6 of A202889.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 25 2011

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Last modified June 24 23:28 EDT 2024. Contains 373691 sequences. (Running on oeis4.)