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%I #4 Jun 18 2012 07:10:04
%S 68798,88681187619,1146407046198040,1199143411128185584,
%T 325754552781442854792,33704464361612549676417,
%U 1829651398830137742302620,59594337869095766240501287,1329775905386553460207679334
%N Half the number of 7X7 0..n symmetric arrays with no 2X2 subblock summing to 2n
%C Row 6 of A213697
%H R. H. Hardin, <a href="/A213702/b213702.txt">Table of n, a(n) for n = 1..10</a>
%e Some solutions for n=4
%e ..0..1..2..3..3..4..2....4..2..1..3..0..1..4....4..4..2..1..4..1..0
%e ..1..3..0..1..4..3..3....2..2..4..3..0..0..1....4..1..2..0..4..0..3
%e ..2..0..0..3..4..2..2....1..4..2..4..2..3..0....2..2..1..0..0..0..2
%e ..3..1..3..1..4..1..4....3..3..4..1..3..4..4....1..0..0..3..2..0..3
%e ..3..4..4..4..3..1..0....0..0..2..3..4..4..3....4..4..0..2..3..4..3
%e ..4..3..2..1..1..1..3....1..0..3..4..4..4..3....1..0..0..0..4..1..2
%e ..2..3..2..4..0..3..2....4..1..0..4..3..3..0....0..3..2..3..3..2..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Jun 18 2012
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