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A073099
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Numerator of b(n) = n*sum(k=2^n,2^(n+1)-1,(-1)^k/k).
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3
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1, 31, 12307, 1180906852403, 4726403852635437852230311, 26387151472737581442533784610190235872453672267436617, 16379090991119093215568426722482532968867795792384100101494022155108529793899838205018451949281878220687877
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| G. Vacca, "A new series for the Eulerian constant", Quart. J. Pure Appl. Math., 1910, vol. 41, pp. 363-368
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FORMULA
| Sum( k>=1, b(k) ) = gamma =0, 5772.....
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PROG
| (PARI) a(n)=numerator( n*sum(k=2^n, 2^(n+1)-1, (-1)^k/k))
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CROSSREFS
| Cf. A001620, A073100.
Sequence in context: A119598 A139295 A069451 * A074218 A161395 A086122
Adjacent sequences: A073096 A073097 A073098 * A073100 A073101 A073102
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KEYWORD
| easy,frac,nonn
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AUTHOR
| Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 18 2002
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