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A172915 Number of 3*n X n 0..6 arrays with row sums 7 and column sums 21 1
0, 4332, 280069725072, 2575828082701033916800, 1572889460074298922779258762727000, 34135169535125235488192553066649784793796595520 (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: A299704 A298431 A172884 * A317046 A259961 A252431

Adjacent sequences:  A172912 A172913 A172914 * A172916 A172917 A172918

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified July 1 16:10 EDT 2022. Contains 354973 sequences. (Running on oeis4.)