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Search: id:A158568
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A158568 a(n)=Sum_{i=1..F(n)} sigma_0(i). F(n) is A000045(n), n>=1, sigma_0(n) is A000005(n). +0
1
1, 1, 3, 5, 10, 20, 37, 70, 127, 231, 413, 746, 1307, 2295, 4010 (list; graph; listen)
OFFSET

1,3

CROSSREFS

Cf. A000005, A000045, A006218, A085831, A062550, A153876, A153817, A153816.

Sequence in context: A117591 A003055 A018101 this_sequence A068013 A018104 A134365

Adjacent sequences: A158565 A158566 A158567 this_sequence A158569 A158570 A158571

KEYWORD

easy,nonn

AUTHOR

Ctibor O. Zizka (c.zizka(AT)email.cz), Mar 21 2009

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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