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A172666 Number of 3*n X n 0..2 arrays with row sums 7 and column sums 21 1
0, 0, 0, 369600, 8432855707512236000, 2333327772435239191435579651896000, 7912042661932746320895028318655823357822209601009, 288661272140059402021783839980598829830361488723258925444306851840 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

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

CROSSREFS

Sequence in context: A172582 A172682 A172778 * A251209 A252800 A291638

Adjacent sequences:  A172663 A172664 A172665 * A172667 A172668 A172669

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified October 5 10:54 EDT 2022. Contains 357255 sequences. (Running on oeis4.)