A172673 Number of 3*n X 9 0..2 arrays with row sums 3 and column sums n

1680, 747558000, 655551508577280, 853588467101915622000, 1392491976667637592480814080, 2631822682451717147804985743769600, 5516710929099784554483904755922151424000

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n=1..24

Crossrefs

Sequence in context: A156422 A172562 A172568 * A172768 A172667 A221204

Adjacent sequences: A172670 A172671 A172672 * A172674 A172675 A172676

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved