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Search: id:A073061
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A073061 a(1)=1, a(2k)=2*a(k), a(2k+1)=3*a(k). +0
1
1, 2, 3, 4, 6, 6, 9, 8, 12, 12, 18, 12, 18, 18, 27, 16, 24, 24, 36, 24, 36, 36, 54, 24, 36, 36, 54, 36, 54, 54, 81, 32, 48, 48, 72, 48, 72, 72, 108, 48, 72, 72, 108, 72, 108, 108, 162, 48, 72, 72, 108, 72, 108, 108, 162, 72, 108, 108, 162, 108, 162, 162, 243, 64, 96, 96 (list; graph; listen)
OFFSET

1,2

FORMULA

There is no general formula but a(5+4k)=a(6+4k), a(A029744(k))=A029744(k), sum(k=1, n, a(k)) is asymptotic to C*n^2*Log(n) with C=0.23...

2^A023416(n) * 3^(A000120(n)-1), n>0. - R. Stephan, Mar 18 2004

CROSSREFS

Sequence in context: A092404 A094871 A079667 this_sequence A006874 A034890 A009490

Adjacent sequences: A073058 A073059 A073060 this_sequence A073062 A073063 A073064

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 16 2002

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.


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