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A114937 Number of connected (5,n)-hypergraphs (without empty edges). 5

%I #9 Dec 17 2022 08:25:47

%S 0,1,15,336,8880,254596,7606446,231899522,7137539256,220623286632,

%T 6831984816402,211719998195278,6562887569336652,203453536535818388,

%U 6307290799931347878,195532244201392935354,6061637498660735815968

%N Number of connected (5,n)-hypergraphs (without empty edges).

%H Goran Kilibarda and Vladeta Jovovic, <a href="https://arxiv.org/abs/1411.4187">Enumeration of some classes of T_0-hypergraphs</a>, arXiv:1411.4187 [math.CO], 2014.

%F E.g.f.: (1/5!)*(exp(31*x) - 5*exp(16*x) + 10*exp(15*x) - 10*exp(10*x) + 20*exp(9*x) - 40*exp(8*x) + 65*exp(7*x) - 90*exp(6*x) + 144*exp(5*x) - 165*exp(4*x) + 120*exp(3*x) - 50*exp(2*x) + 24*exp(x) - 24).

%Y Cf. A002501, A002502, A093732, A093733, A114932-A114936.

%K easy,nonn

%O 0,3

%A Goran Kilibarda and _Vladeta Jovovic_, Jan 08 2006

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Last modified April 19 02:03 EDT 2024. Contains 371782 sequences. (Running on oeis4.)