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Search: id:A165949
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A165949 a(n) = A027762(n)/A165734(n). +0
1
1, 1, 7, 1, 11, 91, 1, 17, 133, 11, 23, 91, 1, 29, 2387, 17, 1, 63973, 1, 451, 301, 23, 47, 1547, 11, 53, 133, 29, 59, 1892891, 1, 17, 10787, 1, 781, 4670029, 1, 1, 553, 7667, 83, 113477, 1, 2047, 45353, 47, 1, 150059, 1, 1111, 721, 53, 107, 6973057, 253, 55709, 7 (list; graph; listen)
OFFSET

1,3

MAPLE

A165734 := proc(n) op( 1+(n mod 2), [30, 6]) ; end:

A027762 := proc(n) a := 0 ; p := 2 ; while p-1 <= 2*n do if (2*n) mod (p-1) = 0 then a := a+1/p ; fi; p := nextprime(p) ; od: denom(a) ; end:

A165949 := proc(n) A027762(n)/A165734(n) ; end: seq(A165949(n), n=1..80) ; # R. J. Mathar, Oct 05 2009

CROSSREFS

Cf. A124886.

Sequence in context: A124886 A061195 A074283 this_sequence A013600 A060393 A060394

Adjacent sequences: A165946 A165947 A165948 this_sequence A165950 A165951 A165952

KEYWORD

nonn

AUTHOR

Paul Curtz (bpcrtz(AT)free.fr), Oct 01 2009

EXTENSIONS

Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 05 2009

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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.


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