A172834 Number of 3*n X n 0..4 arrays with row sums 7 and column sums 21

0, 20, 2332105236, 55821470965449838000, 73884729561168010198433552532700, 2932027248013823224822937070664663188676388640, 2229074240908452234163017626536657006251051388006192816445889

Offset

1,2

Links

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

Crossrefs

Sequence in context: A128671 A172766 A048948 * A271976 A182370 A259331

Adjacent sequences: A172831 A172832 A172833 * A172835 A172836 A172837

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved