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Search: id:A085948
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A085948 Total number of elements in all subsets of {1,2,..,n} with relatively prime elements. +0
1
1, 3, 10, 27, 74, 176, 431, 987, 2259, 5025, 11168, 24351, 53022, 114204, 245221, 523173, 1112996, 2356796, 4978235, 10480426, 22014499, 46125601, 96457248, 201300980, 419404740, 872360898, 1811883714, 3757979313, 7784511152 (list; graph; listen)
OFFSET

1,2

FORMULA

Partial sums of A085411. G.f.: 1/(1-x)*Sum_{k>=0} mu(k)*x^k*(1-x^k)/(1-2*x^k)^2.

CROSSREFS

Sequence in context: A100624 A088809 A069229 this_sequence A000471 A000501 A154496

Adjacent sequences: A085945 A085946 A085947 this_sequence A085949 A085950 A085951

KEYWORD

nonn

AUTHOR

Vladeta Jovovic (vladeta(AT)eunet.rs), Aug 17 2003

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.


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