%I
%S 0,0,8,118,1506,20028,271450,3678640,49775880,673343864,9109364398,
%T 123240784402,1667327405972,22557246670250,305176478640952,
%U 4128726222060840,55857454913515424,755694397322454686
%N Number of n X 4 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.
%H R. H. Hardin, <a href="/A230911/b230911.txt">Table of n, a(n) for n = 1..210</a>
%F Empirical: a(n) = 18*a(n1)  91*a(n2) + 469*a(n3)  919*a(n4) + 2152*a(n5)  93*a(n6) + a(n7).
%F Empirical g.f.: 2*x^3*(1  x)*(4  9*x + 46*x^2  x^3) / (1  18*x + 91*x^2  469*x^3 + 919*x^4  2152*x^5 + 93*x^6  x^7).  _Colin Barker_, Sep 22 2018
%e Some solutions for n=3:
%e ..0..1..0..7....0..1..4..5....0..1..2..1....0..1..2..3....0..1..2..3
%e ..2..3..6..5....2..3..6..7....0..3..0..7....0..1..4..5....0..7..4..3
%e ..4..5..4..3....2..1..0..7....4..5..6..5....0..7..6..5....6..5..4..3
%Y Column 4 of A230915.
%K nonn
%O 1,3
%A _R. H. Hardin_, Nov 01 2013
