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 A061257 Euler transform of reduced totient function psi(n), cf. A002322. 14
 1, 1, 2, 4, 7, 13, 21, 37, 58, 96, 153, 243, 376, 584, 897, 1353, 2046, 3060, 4552, 6714, 9862, 14386, 20898, 30198, 43427, 62159, 88600, 125804, 177881, 250615, 351819, 492203, 686294, 953954, 1321902, 1826394, 2516364, 3457332, 4737576, 6475332 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS T. D. Noe, Table of n, a(n) for n = 0..1000 N. J. A. Sloane, Transforms FORMULA G.f.: Product_{k=1..infinity} (1 - x^k)^(-psi(k)). a(n)=1/n*Sum_{k=1..n} a(n-k)*b(k), n>1, a(0)=1, b(k)=Sum_{d|k} d*psi(d), cf. A061258. MATHEMATICA nn = 20; b = Table[CarmichaelLambda[n], {n, nn}]; CoefficientList[Series[Product[1/(1 - x^m)^b[[m]], {m, nn}], {x, 0, nn}], x] (* T. D. Noe, Jun 19 2012 *) CROSSREFS Cf. A002322, A061258, A006171, A001970, A061255, A061256. Sequence in context: A026691 A018150 A019471 * A061255 A088111 A325864 Adjacent sequences: A061254 A061255 A061256 * A061258 A061259 A061260 KEYWORD easy,nonn AUTHOR Vladeta Jovovic, Apr 21 2001 STATUS approved

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Last modified February 21 03:04 EST 2024. Contains 370219 sequences. (Running on oeis4.)