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Search: id:A027400
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| A027400 |
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Number of labeled servers of dimension 13. |
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+0
1
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| 1, 13, 247, 5811, 159939, 4993911, 173345913, 6593244957, 271829934441, 12046090972149, 569908578269511, 28625770524756483, 1519419921487859547, 84887883112007162511, 4974828151748224390569, 304918429757614547396301
(list; graph; listen)
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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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FORMULA
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E.g.f.: Exp[ Sum[ ((1+x)^i-1)/i, {i, 1, 13} ] ]
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CROSSREFS
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Sequence in context: A000824 A020520 A049665 this_sequence A053100 A126422 A106738
Adjacent sequences: A027397 A027398 A027399 this_sequence A027401 A027402 A027403
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KEYWORD
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nonn
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AUTHOR
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Olivier Gerard (ogerard(AT)ext.jussieu.fr)
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