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A027394
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Number of labeled servers of dimension 7.
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1
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1, 7, 70, 854, 12068, 191996, 3374392, 64635640, 1335753664, 29548086848, 695221579136, 17307703505792, 453917707384960, 12494500081323904, 359807967643449088, 10809816056831434496, 337981832271282386432
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OFFSET
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0,2
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REFERENCES
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R. Donaghey, Binomial self-inverse sequences and tangent coefficients, J. Combin. Theory, Series A, 21 (1976), 155-163.
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..200
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FORMULA
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E.g.f.: Exp( sum( ((1+x)^i-1)/i, i=1..7 ) ).
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MATHEMATICA
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Table[n!*SeriesCoefficient[E^(Sum[((1 + x)^i - 1)/i, {i, 1, 7}]), {x, 0, n}], {n, 0, 20}] (* Vincenzo Librandi, Dec 31 2012 *)
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CROSSREFS
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Sequence in context: A078246 A097184 A002296 * A209327 A113343 A124566
Adjacent sequences: A027391 A027392 A027393 * A027395 A027396 A027397
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KEYWORD
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nonn
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AUTHOR
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Olivier Gérard
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STATUS
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approved
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