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Number of n X n 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing
0

%I #5 Dec 18 2015 18:18:32

%S 2,12,71,361,1748,8007,35513,153450,651075,2723829,11275932,46302339,

%T 188958191,767474182,3105857015

%N Number of n X n 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing

%C Diagonal of A223770

%e Some solutions for n=3

%e ..0..0..0....0..0..0....1..1..1....1..0..0....0..0..0....1..1..1....0..0..1

%e ..0..0..0....0..1..1....1..1..1....0..1..0....0..1..1....0..1..1....0..0..0

%e ..0..0..1....0..1..1....0..1..1....0..1..1....0..0..1....0..1..1....0..0..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 27 2013