A172542 Number of n X n 0..1 arrays with row sums 16 and column sums 16.

1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 355687428096000, 3237415247416050491577971184000, 13564406360915457771720399143711430952267776000, 37911589613425952733393718264069147678877877626169022024515000

Offset

0,18

Links

Brendan D. McKay, Table of n, a(n) for n = 0..30 (terms n=1..20 from R. H. Hardin)

E. R. Canfield and B. D. McKay, Asymptotic enumeration of dense 0-1 matrices with equal row and column sums

Shalosh B. Ekhad and Doron Zeilberger, In How Many Ways Can n (Straight) Men and n (Straight) Women Get Married, if Each Person Has Exactly k Spouses, Maple package Bipartite.

B. D. McKay, 0-1 matrices with constant row and column sums

Crossrefs

Column k=16 of A008300.

Sequence in context: A375012 A239922 A011528 * A198803 A317290 A128769

Adjacent sequences: A172539 A172540 A172541 * A172543 A172544 A172545

Keyword

nonn

Author

R. H. Hardin, Feb 06 2010

Status

approved