A172754 Number of 2*n X n 0..3 arrays with row sums 10 and column sums 20

0, 0, 0, 1093050, 37642786694586601, 14162844503221350778432935135, 53130204996192153080609362878028936125345, 1711672166340730383529033759740996945302163471959773200

Offset

1,4

Links

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

Crossrefs

Sequence in context: A109148 A077647 A172647 * A268036 A184384 A086212

Adjacent sequences: A172751 A172752 A172753 * A172755 A172756 A172757

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved