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A172628 Number of n X n 0..2 arrays with row sums 7 and column sums 7 1
0, 0, 0, 24, 111920, 2030271480, 91358224634433, 9350902053107858880, 2018328183128437950016800, 859819730886010540636567920000, 682948436592331311886782349445512800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

R. H. Hardin, Table of n, a(n) for n=1..21

CROSSREFS

Sequence in context: A003920 A052504 A159388 * A294318 A061527 A210278

Adjacent sequences:  A172625 A172626 A172627 * A172629 A172630 A172631

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified September 24 16:48 EDT 2021. Contains 347651 sequences. (Running on oeis4.)