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A151809 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 9 ones in any row or column. 0
2, 4, 21, 330, 14610, 1820715, 653629616, 696496706166, 2267861968974085, 22834969089394690311 (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: A151806 A151807 A151808 * A151801 A284920 A254221

Adjacent sequences:  A151806 A151807 A151808 * A151810 A151811 A151812

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 27 2009

STATUS

approved

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Last modified January 20 18:38 EST 2022. Contains 350472 sequences. (Running on oeis4.)