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A214007
Number of n X n nonnegative integer matrices with row and column i=1..n having sum <= i*3
0
4, 160, 85639, 641631566, 69768979161580, 113333423255541329550
OFFSET
1,1
COMMENTS
Column 3 of A214011
EXAMPLE
Some solutions for n=3
..0..0..0....0..0..0....2..0..0....0..0..1....0..0..0....1..0..0....3..0..0
..3..0..0....0..2..0....0..1..0....0..0..1....0..2..0....0..0..4....0..0..1
..0..4..0....0..0..3....1..2..0....0..6..0....3..0..1....0..6..0....0..1..7
CROSSREFS
Sequence in context: A224275 A224198 A104133 * A248330 A157463 A041779
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 30 2012
STATUS
approved