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%I #6 Jul 17 2015 17:43:30
%S 0,0,0,1,250,54219,14697256,5713126349,3406380649146,3235013673306411,
%T 5006915703789559516,12814921349279258614386,
%U 54759970343589573849950696,393147238947490609962950665584,4762079888047633609309896734274288
%N Number of n X n nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 3 and every value increasing by 0 or 1 with every step right, diagonally se or down.
%C Diagonal of A253011.
%e Some solutions for n=6:
%e ..0..0..0..0..0..0....0..0..0..0..0..0....0..1..1..1..1..2....0..0..1..1..1..2
%e ..0..0..0..0..0..1....0..0..0..1..1..1....1..1..1..1..1..2....0..0..1..1..1..2
%e ..0..0..1..1..1..1....0..0..0..1..1..1....1..1..1..1..1..2....0..1..1..1..2..2
%e ..0..0..1..1..1..2....0..0..0..1..1..2....1..1..1..1..1..2....1..1..1..2..2..2
%e ..0..0..1..1..1..2....0..0..0..1..1..2....1..1..1..1..1..2....1..1..1..2..2..2
%e ..1..1..1..1..1..2....1..1..1..1..2..2....1..2..2..2..2..2....1..1..1..2..2..2
%K nonn
%O 1,5
%A _R. H. Hardin_, Dec 25 2014
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