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A162578
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Partial sums of the Carmichael lambda function A002322.
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1
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1, 2, 4, 6, 10, 12, 18, 20, 26, 30, 40, 42, 54, 60, 64, 68, 84, 90, 108, 112, 118, 128, 150, 152, 172, 184, 202, 208, 236, 240, 270, 278, 288, 304, 316, 322, 358, 376, 388, 392, 432, 438, 480, 490, 502, 524, 570, 574, 616, 636, 652, 664, 716, 734, 754, 760, 778
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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FORMULA
| a(n) = sum_{k=1..n} A002322(k).
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MAPLE
| read("transforms3") ; a002322 := BFILETOLIST("b002322.txt") : A162578 :=proc(n) global a002322 ; local i; add(op(i, a002322), i=1..n) ; end: seq(A162578(n), n=1..120) ; [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 16 2009]
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MATHEMATICA
| f[n_]:=CarmichaelLambda[n]; s=0; lst={}; Do[AppendTo[lst, s+=f[n]], {n, 1, 5!}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), May 14 2010]
Accumulate[CarmichaelLambda[Range[60]]] (* From Harvey P. Dale, Sep 21 2011 *)
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CROSSREFS
| Cf. A002322.
Sequence in context: A045954 A072542 A167856 * A152919 A092249 A002088
Adjacent sequences: A162575 A162576 A162577 * A162579 A162580 A162581
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KEYWORD
| easy,nonn
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AUTHOR
| Jonathan Vos Post (jvospost3(AT)gmail.com), Jul 06 2009
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EXTENSIONS
| a(13) corrected and more terms added by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 16 2009
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