A027404 Number of labeled servers of dimension 17.

1, 17, 425, 13209, 481593, 19960329, 921249873, 46658112705, 2564687821041, 151696177306497, 9588646038606201, 644058017836810857, 45753059704756733865, 3423681133127801126649, 268929096702949443999393

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..17 ) ).

Mathematica

Table[n!*SeriesCoefficient[E^(Sum[((1+x)^i - 1)/i, {i, 1, 17}]), {x, 0, n}], {n, 0, 20}] (* Vincenzo Librandi, Jan 01 2013 *)

Crossrefs

Sequence in context: A374230 A134940 A196676 * A053114 A221443 A222648

Adjacent sequences: A027401 A027402 A027403 * A027405 A027406 A027407

Keyword

nonn

Author

Olivier Gérard

Status

approved