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A027395
Number of labeled servers of dimension 8.
1
1, 8, 92, 1296, 21204, 391392, 7994736, 178242624, 4292944992, 110800827648, 3044857866624, 88617231585792, 2719329626619648, 87650060321746944, 2957815082168303616, 104203601012012802048, 3822969716887701993984
OFFSET
0,2
LINKS
R. Donaghey, Binomial self-inverse sequences and tangent coefficients, J. Combin. Theory, Series A, 21 (1976), 155-163.
FORMULA
E.g.f.: exp( sum(k=1..8, ((1+x)^k-1)/k ) ).
MATHEMATICA
Table[n!*SeriesCoefficient[E^(Sum[((1 + x)^i - 1)/i, {i, 1, 8}]), {x, 0, n}], {n, 0, 20}] (* Vincenzo Librandi, Dec 31 2012 *)
CROSSREFS
Sequence in context: A194042 A231618 A346768 * A277307 A255520 A305967
KEYWORD
nonn
STATUS
approved