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Search: id:A069073
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| 0, 9, 450, 3675, 15876, 49005, 122694, 266175, 520200, 938961, 1592010, 2566179, 3967500, 5923125, 8583246, 12123015, 16744464, 22678425, 30186450, 39562731, 51136020, 65271549, 82372950, 102884175, 127291416, 156125025, 189961434
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OFFSET
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0,2
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REFERENCES
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Konrad Knopp, Theory and application of infinite series, Dover, p. 269
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LINKS
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Konrad Knopp, Theorie und Anwendung der unendlichen Reihen, Berlin, J. Springer, 1922. (Original german edition of "Theory and Application of Infinite Series")
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FORMULA
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sum(n=1, inf, 1/a(n))=3/2-2ln(2)
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CROSSREFS
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Sequence in context: A156092 A092813 A167720 this_sequence A156086 A160478 A020263
Adjacent sequences: A069070 A069071 A069072 this_sequence A069074 A069075 A069076
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KEYWORD
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easy,nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 05 2002
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