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 A230172 Number of nX4 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j) 1

%I

%S 9,1407,78849,4722977,284444079,17072965263,1027868078181,

%T 61861526624839,3721702070420191,223920929460093089,

%U 13473042937456532657,810647385075641076549,48774886700839338028985,2934683063063203660000047

%N Number of nX4 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value 2-x(i,j)

%C Column 4 of A230176

%H R. H. Hardin, <a href="/A230172/b230172.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A230172/a230172.txt">Empirical recurrence of order 81</a>

%F Empirical recurrence of order 81 (see link above)

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 11 2013

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Last modified July 24 21:47 EDT 2021. Contains 346273 sequences. (Running on oeis4.)