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Search: id:A095975
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| 1, 2, 5, 11, 27, 60, 147, 344, 839, 2031, 5017, 12379, 30921, 77407, 195121, 493451, 1253613, 3194303, 8166757, 20933754, 53798919, 138566312, 357647565, 924834079, 2395702801, 6215748612, 16150985071, 42024182520, 109485000777
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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N. J. A. Sloane, Transforms
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FORMULA
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Moebius transform of A055890(n).
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MAPLE
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with (numtheory): b:= proc(n) option remember; `if`(n=0, 1, add (add (d, d=divisors(j)) *b(n-j), j=1..n)/n) end: c:= proc(n) option remember; local j; add(c(j) *b(n-j), j=1..n-1)-n*b(n) end: a:= -proc(n) option remember; local d; `if`(n=0, 1, add (mobius (n/d)*c(d), d=divisors(n))/n) end: seq (a(n), n=1..40); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Sep 09 2008]
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CROSSREFS
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Sequence in context: A095892 A000664 A067922 this_sequence A006652 A073225 A027087
Adjacent sequences: A095972 A095973 A095974 this_sequence A095976 A095977 A095978
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KEYWORD
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easy,nonn
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AUTHOR
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Vladeta Jovovic (vladeta(AT)eunet.rs), Jul 20 2004
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EXTENSIONS
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More terms from Alois P. Heinz (heinz(AT)hs-heilbronn.de), Sep 09 2008
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