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Number of nX6 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three no more than once.
1

%I #4 Feb 20 2016 06:18:29

%S 2592,408596,54199284,6766301156,815458664276,95884587957284,

%T 11067174233536260,1259009098075800036,141573069581490127524,

%U 15769412440038867100180,1742724618979587037657388

%N Number of nX6 0..3 arrays with some element plus some horizontally, antidiagonally or vertically adjacent neighbor totalling three no more than once.

%C Column 6 of A269143.

%H R. H. Hardin, <a href="/A269141/b269141.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

%e ..2..0..2..3..2..2. .0..2..3..1..0..0. .0..2..0..1..3..3. .1..1..1..1..1..1

%e ..0..1..3..3..2..3. .0..2..1..1..0..0. .0..2..1..3..3..1. .0..1..3..3..1..3

%Y Cf. A269143.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 20 2016