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A202556
Number of nX4 0,1 arrays with the row and column sums nondecreasing.
1
5, 37, 235, 1526, 9325, 57255, 342295, 2048759, 12097875, 71623580, 421070137, 2483305077, 14588495861, 85996521989, 505767515227, 2984447588198, 17583885515973, 103920730449567, 613473612747653, 3631554358770128
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OFFSET
1,1
COMMENTS
Column 4 of
A202560
LINKS
R. H. Hardin,
Table of n, a(n) for n = 1..46
EXAMPLE
Some solutions for n=6
..1..0..1..0....0..0..0..0....0..0..1..0....0..0..0..0....0..1..0..0
..0..1..0..1....0..0..0..0....1..0..0..1....0..1..0..1....1..0..0..0
..0..1..0..1....0..0..0..0....0..1..0..1....1..0..0..1....0..0..0..1
..0..0..1..1....1..0..0..1....0..1..0..1....0..1..1..0....0..0..0..1
..1..1..0..0....0..0..1..1....1..0..1..1....0..0..1..1....0..0..1..0
..0..0..1..1....0..1..1..1....0..1..1..1....1..1..1..1....0..0..0..1
CROSSREFS
Sequence in context:
A339386
A088582
A088583
*
A015548
A183385
A054417
Adjacent sequences:
A202553
A202554
A202555
*
A202557
A202558
A202559
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Dec 21 2011
STATUS
approved
