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A027409 Number of labeled servers of dimension 22. 1
1, 22, 715, 28974, 1380093, 74841558, 4525209711, 300561720030, 21686284145097, 1685085369468534, 140028734022344739, 12373253024424889518, 1157017818664396423845, 114029077860692830245366 (list; graph; refs; listen; history; text; internal format)
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( sum( ((1+x)^i-1)/i, i=1..22 ) ).
MATHEMATICA
Table[n!*SeriesCoefficient[E^(Sum[((1+x)^i - 1)/i, {i, 1, 22}]), {x, 0, n}], {n, 0, 20}] (* Vincenzo Librandi, Jan 01 2013 *)
CROSSREFS
Sequence in context: A025760 A229124 A262417 * A159189 A067768 A181181
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)