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Number of 4Xn 0..7 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero
1

%I #4 Nov 01 2013 08:45:18

%S 0,0,0,118,5714,154352,4725576,148720522,4752381758,151802078918,

%T 4831723113864,153597529651048,4882134369209864,155195921955688850,

%U 4933695769219550664,156842489770583030128,4985982499472122206542

%N Number of 4Xn 0..7 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero

%C Row 4 of A230915

%H R. H. Hardin, <a href="/A230917/b230917.txt">Table of n, a(n) for n = 1..26</a>

%e Some solutions for n=4

%e ..0..1..0..7....0..1..2..3....0..1..2..1....0..1..0..7....0..1..0..7

%e ..2..3..4..5....0..7..4..3....2..3..4..5....2..3..6..5....2..3..6..5

%e ..2..1..6..5....6..5..4..3....2..3..6..7....4..5..4..3....4..5..4..3

%e ..0..7..6..5....4..1..2..1....2..1..0..7....4..3..2..1....0..1..2..1

%K nonn

%O 1,4

%A _R. H. Hardin_, Nov 01 2013