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A151803 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 3 ones in any row or column. 0
2, 4, 21, 242, 4027, 87082, 2381388, 80218256, 3251373408, 155558286540 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..10.

CROSSREFS

Sequence in context: A308763 A230690 A219745 * A151804 A151805 A151806

Adjacent sequences:  A151800 A151801 A151802 * A151804 A151805 A151806

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 27 2009

STATUS

approved

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Last modified February 24 13:13 EST 2021. Contains 341569 sequences. (Running on oeis4.)