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A223763
Number of n X n 0..1 arrays with rows, columns and antidiagonals unimodal and diagonals nondecreasing
0
2, 12, 71, 361, 1748, 8007, 35513, 153450, 651075, 2723829, 11275932, 46302339, 188958191, 767474182, 3105857015
OFFSET
1,1
COMMENTS
Diagonal of A223770
EXAMPLE
Some solutions for n=3
..0..0..0....0..0..0....1..1..1....1..0..0....0..0..0....1..1..1....0..0..1
..0..0..0....0..1..1....1..1..1....0..1..0....0..1..1....0..1..1....0..0..0
..0..0..1....0..1..1....0..1..1....0..1..1....0..0..1....0..1..1....0..0..0
CROSSREFS
Sequence in context: A012421 A012381 A012376 * A361960 A002630 A009552
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 27 2013
STATUS
approved