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A027410 Number of labeled servers of dimension 23. 1
1, 23, 782, 33166, 1653884, 93917924, 5947476712, 413793483368, 31278776664224, 2546554728018016, 221748772939284416, 20534447545911194048, 2012485449681377005312, 207891800652614878059776 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

R. Donaghey, Binomial self-inverse sequences and tangent coefficients, J. Combin. Theory, Series A, 21 (1976), 155-163.

FORMULA

E.g.f.: exp( sum( ((1+x)^i-1)/i, i=1..23 ) ).

MATHEMATICA

Table[n!*SeriesCoefficient[E^(Sum[((1+x)^i - 1)/i, {i, 1, 23}]), {x, 0, n}], {n, 0, 20}] (* Vincenzo Librandi, Jan 01 2013 *)

CROSSREFS

Sequence in context: A236302 A179793 A152183 * A158505 A217116 A081731

Adjacent sequences:  A027407 A027408 A027409 * A027411 A027412 A027413

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified November 24 10:51 EST 2014. Contains 249895 sequences.