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A214005
Number of n X n nonnegative integer matrices with row and column i=1..n having sum <= i.
0
2, 12, 271, 24950, 9800058, 16942485560, 131898088386405, 4704783844260626244
OFFSET
1,1
COMMENTS
Column 1 of A214011.
EXAMPLE
Some solutions for n=3:
..1..0..0....0..1..0....0..0..0....0..1..0....0..0..0....0..1..0....0..0..1
..0..1..1....0..1..0....0..0..1....1..0..0....0..1..1....0..0..1....1..0..0
..0..0..2....0..0..1....0..0..2....0..1..0....0..0..1....0..0..0....0..0..1
CROSSREFS
Cf. A214011.
Sequence in context: A289314 A091504 A098137 * A014982 A012444 A012754
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Jun 30 2012
STATUS
approved