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A055788 Number of symmetric types of (5,2n)-hypergraphs under action of complementing group C(5,2). 0
1, 31, 186, 1581, 7316, 30039, 103974, 330429, 947050, 2533289, 6325550, 14969435, 33665380, 72544185, 150236850, 300540195, 582235491, 1096087770, 2009383420, 3595937070, 6292703640, 10787811210, 18142828740, 29975617710 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..23.

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.

CROSSREFS

Cf. A051502.

Sequence in context: A145838 A243522 A227523 * A042876 A042878 A165130

Adjacent sequences:  A055785 A055786 A055787 * A055789 A055790 A055791

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Jul 13 2000

EXTENSIONS

More terms from James A. Sellers, Aug 22 2000

STATUS

approved

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Last modified January 19 06:34 EST 2020. Contains 331033 sequences. (Running on oeis4.)