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Search: id:A030012
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| A030012 |
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Euler transform of {1, primes}. |
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+0
1
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| 1, 3, 6, 14, 27, 58, 109, 216, 402, 760, 1390, 2550, 4569, 8178, 14408, 25280, 43850, 75685, 129436, 220226, 371906, 624840, 1043178, 1733108, 2863422, 4709222, 7706800, 12558213, 20372860, 32917707
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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N. J. A. Sloane, Transforms
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MAPLE
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with (numtheory): etr:= proc(p) local b; b:=proc(n) option remember; if n=0 then 1 else add (add (d*p(d), d=divisors(j)) *b(n-j), j=1..n)/n fi end end: a:= n-> etr (k-> if k<=1 then k else ithprime(k-1) fi)(n+1): seq (a(n), n=0..29); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Sep 07 2008]
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CROSSREFS
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Sequence in context: A120940 A049940 A051749 this_sequence A001970 A006951 A132891
Adjacent sequences: A030009 A030010 A030011 this_sequence A030013 A030014 A030015
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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