A027398 Number of labeled servers of dimension 11.

1, 11, 176, 3476, 80146, 2093014, 60684184, 1925761904, 66178495724, 2442338082404, 96153966959776, 4016198275877776, 177154100553295096, 8220076099025550056, 399875590850824743776, 20334017317908076095104

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..11 ) ).

Mathematica

Table[n!*SeriesCoefficient[E^(Sum[((1+x)^i - 1)/i, {i, 1, 11}]), {x, 0, n}], {n, 0, 20}] (* Vincenzo Librandi, Dec 31 2012 *)

Crossrefs

Sequence in context: A196664 A003729 A230388 * A305970 A081740 A051687

Adjacent sequences: A027395 A027396 A027397 * A027399 A027400 A027401

Keyword

nonn

Author

Olivier Gérard

Status

approved