A172749 Number of 2*n X n 0..3 arrays with row sums 9 and column sums 18

0, 0, 1, 122975608, 552523141020099900, 28004870901329112246159413600, 13286253592938310343269948335403784033355, 48077185419930811359972085602422918530347454406137600

Offset

1,4

Links

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

Crossrefs

Sequence in context: A215264 A307115 A079332 * A172781 A172845 A172888

Adjacent sequences: A172746 A172747 A172748 * A172750 A172751 A172752

Keyword

nonn

Author

R. H. Hardin Feb 06 2010

Status

approved