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%I #5 Aug 11 2014 22:45:56
%S 1176,5404,26488,155104,909408,5878272,36964980,249710396,1622032500,
%T 11215026376,74076824924,518810087196,3457277192904,24385605821656,
%U 163265938186764,1156012704135280,7758896886604512,55050635581902056
%N Number of (n+1)X(2+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21
%C Column 2 of A233875
%H R. H. Hardin, <a href="/A233870/b233870.txt">Table of n, a(n) for n = 1..210</a>
%H R. H. Hardin, <a href="/A233870/a233870.txt">Empirical recurrence of order 71</a>
%F Empirical recurrence of order 71 (see link above)
%e Some solutions for n=4
%e ..2..5..2....6..1..7....6..3..1....6..6..3....6..0..6....0..3..7....0..3..6
%e ..1..7..1....7..3..6....0..6..7....7..0..6....7..6..7....7..3..0....0..6..0
%e ..1..4..7....1..6..0....3..6..0....2..2..5....6..0..6....3..0..6....7..6..3
%e ..1..7..1....4..0..3....1..7..6....7..0..6....7..6..3....7..3..0....0..6..0
%e ..0..1..0....4..7..3....6..3..1....3..3..0....3..1..7....3..0..6....3..6..3
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 17 2013