A027393 Number of labeled servers of dimension 6.

1, 6, 51, 526, 6261, 83670, 1232335, 19742190, 340632825, 6281417350, 123031916475, 2546554829550, 55463580338125, 1266494279875350, 30225798507297975, 751874518736980750, 19447447965603896625

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( (x*(360 + 450*x + 400*x^2 + 225*x^3 + 72*x^4 + 10*x^5))/60 ).

Mathematica

Table[n!*SeriesCoefficient[E^((x * (360 + 450 * x + 400 * x^2 + 225 * x^3 + 72 * x^4 + 10 * x^5))/60), {x, 0, n}], {n, 0, 20}] (* Vincenzo Librandi, Dec 31 2012 *)

Crossrefs

Sequence in context: A369507 A215159 A263895 * A346766 A305965 A255518

Adjacent sequences: A027390 A027391 A027392 * A027394 A027395 A027396

Keyword

nonn

Author

Olivier Gérard

Status

approved