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Search: id:A133798
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| 0, 0, 3, 14, 75, 454, 3185, 25486, 229383, 2293838, 25232229, 302786758, 3936227867, 55107190150, 826607852265, 13225725636254, 224837335816335, 4047072044694046, 76894368849186893, 1537887376983737878
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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n divides a(n) and a(n+2) for odd n. 2 divides a(n) for even n. - Alexander Adamchuk (alex(AT)kolmogorov.com), Jan 11 2008
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LINKS
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Alexander Adamchuk (alex(AT)kolmogorov.com), Jan 11 2008, Table of n, a(n) for n = 1..51
E. W. Weisstein, Link to a section of The World of Mathematics. Mousetrap.
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MATHEMATICA
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Denominator[k=1; NestList[1+1/(k++ #1)&, 1, 50]] - 1 - Alexander Adamchuk (alex(AT)kolmogorov.com), Jan 11 2008
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CROSSREFS
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Cf. A002467.
Sequence in context: A126122 A026004 A063016 this_sequence A100937 A048779 A052186
Adjacent sequences: A133795 A133796 A133797 this_sequence A133799 A133800 A133801
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KEYWORD
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nonn
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AUTHOR
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Zak Seidov, Jan 07 2008
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