A172556 Number of 2*n X 6 0..1 arrays with row sums 3 and column sums n

20, 1860, 297200, 60871300, 14367744720, 3718394156400, 1026608414145600, 297348703692826500, 89365729945562642000, 27658131940039664137360, 8766913970029589057611200, 2834492178580299130305958000

Offset

1,1

Links

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

Crossrefs

Sequence in context: A177297 A014606 A330196 * A246619 A222973 A267575

Adjacent sequences: A172553 A172554 A172555 * A172557 A172558 A172559

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved