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A172671 Number of 3*n X 6 0..2 arrays with row sums 2 and column sums n 1
90, 202410, 747558000, 3536978063850, 19292117692187340, 115428185943399529200, 737005538936597762145600, 4937928427617947420104982250, 34335031273255183438800013252500 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

R. H. Hardin, Table of n, a(n) for n=1..33

CROSSREFS

Sequence in context: A279442 A172572 A052277 * A066784 A135321 A135428

Adjacent sequences:  A172668 A172669 A172670 * A172672 A172673 A172674

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified February 17 15:19 EST 2019. Contains 320220 sequences. (Running on oeis4.)