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A172661 Number of 2*n X 6 0..2 arrays with row sums 3 and column sums n 1
20, 16260, 16214000, 20982583300, 31091880269520, 50432680389260400, 87186713382942888000, 158040497103890978362500, 297155971199028097720850000, 575241665325478123466841078160 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

R. H. Hardin, Table of n, a(n) for n=1..49

CROSSREFS

Sequence in context: A028667 A201507 A167060 * A172758 A146497 A348144

Adjacent sequences:  A172658 A172659 A172660 * A172662 A172663 A172664

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified October 2 05:52 EDT 2022. Contains 357191 sequences. (Running on oeis4.)