A172614 - OEIS

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A172614

Number of 9*n X n 0..1 arrays with row sums 2 and column sums 18

0, 1, 227873431500, 30862498453931119524941700, 303467065300162961503136931771371140440000, 98744132720453916340813668495424059077053759331765698612500

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,3

LINKS

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

CROSSREFS

Sequence in context: A108496 A185430 A221263 * A112431 A202725 A132908

Adjacent sequences: A172611 A172612 A172613 * A172615 A172616 A172617

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved