A027410 Number of labeled servers of dimension 23.

1, 23, 782, 33166, 1653884, 93917924, 5947476712, 413793483368, 31278776664224, 2546554728018016, 221748772939284416, 20534447545911194048, 2012485449681377005312, 207891800652614878059776

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