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A060045 Generalized sum of divisors function: third diagonal of A060044. 1
1, -1, 1, -2, 10, -11, 12, -21, 31, -13, 23, -42, 42, -42, 43, 22, -14, 33, -126, 185, -273, 406, -387, 637, -945, 1092, -1389, 1841, -2358, 2852, -3023, 3876, -4953, 5593, -6321, 7581, -9222, 10241, -11205, 14021, -16247, 17710, -19858, 23015, -26705, 28908, -31318, 36270, -41316, 45619, -49015, 55287 (list; graph; refs; listen; history; text; internal format)
OFFSET

9,4

LINKS

Table of n, a(n) for n=9..60.

P. A. MacMahon, Divisors of numbers and their continuations in the theory of partitions, Proc. London Math. Soc., 19 (1919), 75-113; Coll. Papers II, pp. 303-341.

FORMULA

G.f.: (t(1)^3-3*t(1)*t(2)+2*t(3))/6 where t(i) = Sum(x^(n*i)/(1+x^n)^(2*i),n=1..inf), i=1..3. - Vladeta Jovovic, Sep 21 2007

CROSSREFS

Sequence in context: A188264 A169683 A134948 * A000462 A282093 A032930

Adjacent sequences:  A060042 A060043 A060044 * A060046 A060047 A060048

KEYWORD

sign,easy,changed

AUTHOR

N. J. A. Sloane, Mar 19 2001

EXTENSIONS

More terms from Naohiro Nomoto, Jan 24 2002

More terms from Vladeta Jovovic, Sep 21 2007

STATUS

approved

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Last modified July 23 03:00 EDT 2019. Contains 325230 sequences. (Running on oeis4.)