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%I #4 Dec 18 2013 08:40:07
%S 774,3040,11622,51026,218602,1058618,4923910,25667010,126489782,
%T 690800294,3533497602,19797058950,103613461346,587718236894,
%U 3119919914130,17784977065082,95276354415258,543743313418490
%N Number of (n+1)X(2+1) 0..6 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 18
%C Column 2 of A233997
%H R. H. Hardin, <a href="/A233991/b233991.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..5..3..5....0..4..0....5..0..0....0..5..0....3..3..1....6..0..4....0..1..6
%e ..0..0..0....6..4..6....6..5..3....2..5..6....0..6..6....6..6..4....5..4..1
%e ..6..0..6....1..1..1....5..0..0....0..5..0....3..3..1....6..0..4....0..1..6
%e ..1..1..1....0..6..0....5..6..0....2..5..6....0..6..6....4..4..6....5..4..1
%e ..4..6..4....2..2..2....1..2..2....5..0..5....3..3..1....6..0..4....1..0..5
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 18 2013
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