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A007731
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a(n)=a([ n/2 ])+a([ n/3 ])+a([ n/6 ]).
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7
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1, 3, 5, 7, 9, 9, 15, 15, 17, 19, 19, 19, 29, 29, 29, 29, 31, 31, 41, 41, 41, 41, 41, 41, 55, 55, 55, 57, 57, 57, 57, 57, 59, 59, 59, 59, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 85, 103, 103, 103, 103, 103, 103, 117, 117
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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LINKS
| T. D. Noe, Table of n, a(n) for n=0..10000
P. Erdos, A. Hildebrand, A. Odlyzko, P. Pudaite and B. Reznick, The asymptotic behavior of a family of sequences, Pacific J. Math., 126 (1987), pp. 227-241.
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FORMULA
| From given link, a(n) is asymptotic to c*n where c = 12/log(432) = 1.97744865.. - Benoit Cloitre (benoit7848c(AT)orange.fr), Dec 18 2002
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MAPLE
| A007731 := proc(n) option remember; if n=0 then RETURN(1) else RETURN( A007731(trunc(n/2))+A007731(trunc(n/3))+A007731(trunc(n/6))); fi; end;
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CROSSREFS
| A083662, A088468, A165704, A165706. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 26 2009]
Sequence in context: A139081 A196189 A206543 * A079377 A047747 A007957
Adjacent sequences: A007728 A007729 A007730 * A007732 A007733 A007734
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KEYWORD
| nonn,easy,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
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