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A027393
Number of labeled servers of dimension 6.
1
1, 6, 51, 526, 6261, 83670, 1232335, 19742190, 340632825, 6281417350, 123031916475, 2546554829550, 55463580338125, 1266494279875350, 30225798507297975, 751874518736980750, 19447447965603896625
OFFSET
0,2
LINKS
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
KEYWORD
nonn
STATUS
approved