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A172708 Number of 7*n X n 0..2 arrays with row sums 3 and column sums 21 1
0, 3432, 8385127334900305, 6691944921318182113271713149120, 560802479516289977082608657662771140464350896000, 2224408910230139891062284534118773609167351452658037731567555400000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

CROSSREFS

Sequence in context: A172832 A172881 A172913 * A244170 A245792 A046253

Adjacent sequences:  A172705 A172706 A172707 * A172709 A172710 A172711

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified October 22 05:36 EDT 2021. Contains 348160 sequences. (Running on oeis4.)