A055788 Number of symmetric types of (5,2n)-hypergraphs under action of complementing group C(5,2).

1, 31, 186, 1581, 7316, 30039, 103974, 330429, 947050, 2533289, 6325550, 14969435, 33665380, 72544185, 150236850, 300540195, 582235491, 1096087770, 2009383420, 3595937070, 6292703640, 10787811210, 18142828740, 29975617710

Offset: 0

Author

Vladeta Jovovic, Jul 13 2000

Keywords

• nonn

Crossrefs

Cf. A051502.

Formula

G.f.: (62/(1-x^2)^16-310/(1-x^4)^8+1240/(1-x^8)^4-1984/(1-x^16)^2+1024/(1-x^32))/32.

Extensions

More terms from James Sellers, Aug 22 2000