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A027406 Number of labeled servers of dimension 19. 1
1, 19, 532, 18544, 758974, 35337226, 1833202384, 104409838312, 6456768305884, 429818796312724, 30587559391254736, 2313781261593170464, 185160727825248627112, 15612253234853491025464 (list; graph; refs; listen; history; text; internal format)
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..19 ) ).

MATHEMATICA

Table[n!*SeriesCoefficient[E^(Sum[((1+x)^i - 1)/i, {i, 1, 19}]), {x, 0, n}], {n, 0, 20}] (* Vincenzo Librandi, Jan 01 2013 *)

CROSSREFS

Sequence in context: A057644 A283382 A196512 * A053116 A309313 A158211

Adjacent sequences:  A027403 A027404 A027405 * A027407 A027408 A027409

KEYWORD

nonn

AUTHOR

Olivier Gérard

STATUS

approved

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Last modified April 6 11:51 EDT 2020. Contains 333273 sequences. (Running on oeis4.)