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A151805
Number of n X n binary arrays with rows, considered as binary numbers, in strictly increasing order, and columns, considered as binary numbers, in nondecreasing order, and no more than 5 ones in any row or column.
0
2, 4, 21, 330, 14610, 1615666, 360541154, 138557401940, 84078437148114
OFFSET
1,1
CROSSREFS
Sequence in context: A219745 A151803 A151804 * A151806 A151807 A151808
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 27 2009
STATUS
approved