A027397 Number of labeled servers of dimension 10.

1, 10, 145, 2590, 53935, 1270798, 33213955, 949441810, 29371429345, 975236890330, 34526021240809, 1296190060488190, 51368290426260655, 2140624557899891710, 93487359214816335115, 4266459267720049656562

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..10 ) ).

Mathematica

Table[n!*SeriesCoefficient[E^(Sum[((1+x)^i - 1)/i, {i, 1, 10}]), {x, 0, n}], {n, 0, 20}] (* Vincenzo Librandi, Dec 31 2012 *)

Crossrefs

Sequence in context: A059968 A255522 A113354 * A305969 A081697 A134526

Adjacent sequences: A027394 A027395 A027396 * A027398 A027399 A027400

Keyword

nonn

Author

Olivier Gérard

Status

approved