%I #4 Feb 20 2016 11:33:48
%S 0,889056,118872576,17118725376,2267772823680,292321215814512,
%T 36713945487331392,4528086446983948224,550465224463202188320,
%U 66156064863501806179776,7876627077577027391888640
%N Number of 6Xn 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three exactly once.
%C Row 6 of A269214.
%H R. H. Hardin, <a href="/A269219/b269219.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=2
%e ..0..2. .0..0. .0..0. .0..0. .0..1. .0..0. .0..0. .0..1. .0..0. .0..2
%e ..0..1. .2..3. .0..1. .0..2. .0..0. .0..2. .0..2. .0..1. .0..0. .0..0
%e ..3..1. .3..2. .1..1. .3..2. .3..1. .2..0. .2..2. .3..2. .2..3. .0..2
%e ..3..3. .2..2. .1..3. .3..3. .0..2. .2..2. .3..2. .0..3. .2..0. .3..0
%e ..2..3. .2..0. .2..1. .1..2. .0..1. .1..0. .3..1. .3..1. .0..0. .2..3
%e ..3..0. .1..3. .3..2. .2..3. .3..2. .1..1. .0..0. .3..3. .0..2. .3..2
%Y Cf. A269214.
%K nonn
%O 1,2
%A _R. H. Hardin_, Feb 20 2016
|