A008324 Number of simple regular bipartite graphs with 2n nodes.

1, 2, 3, 4, 6, 8, 18, 40, 230, 4296, 431206, 162267272, 201636689771, 777816803942186, 9865957936943931964, 395886667549681689591841, 53716176608076643470621234239, 23524515269630339982914646821899537, 35682168849414944013547274452501768506834

Offset

0,2

Comments

First differs from A333732 at n = 12. - Andrew Howroyd, Apr 03 2020

Links

Table of n, a(n) for n=0..18.

Brendan McKay and E. Rogoyski, Latin squares of order ten, Electron. J. Combinatorics, 2 (1995) #N3.

Crossrefs

Row sums of A008327.

Cf. A033995, A008323, A333732.

Sequence in context: A294679 A333160 A345250 * A333732 A274456 A333681

Adjacent sequences: A008321 A008322 A008323 * A008325 A008326 A008327

Keyword

nonn,hard,nice

Author

Brendan McKay

Extensions

a(0)=1 prepended and terms a(11) and beyond from Andrew Howroyd, Apr 03 2020

Status

approved