

A321550


a(n) = Sum_{dn} (1)^(d1)*d^11.


2



1, 2047, 177148, 4196351, 48828126, 362621956, 1977326744, 8594130943, 31381236757, 99951173922, 285311670612, 743375186948, 1792160394038, 4047587844968, 8649804864648, 17600780175359, 34271896307634, 64237391641579, 116490258898220, 204899955368226, 350279478046112
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OFFSET

1,2


LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..10000
J. W. L. Glaisher, On the representations of a number as the sum of two, four, six, eight, ten, and twelve squares, Quart. J. Math. 38 (1907), 162 (see p. 4 and p. 8).
Index entries for sequences mentioned by Glaisher


FORMULA

G.f.: Sum_{k>=1} (1)^(k1)*k^11*x^k/(1  x^k).  Ilya Gutkovskiy, Dec 24 2018


PROG

(PARI) apply( a(n)=sumdiv(n, d, (1)^(d1)*d^11), [1..30]) \\ M. F. Hasler, Nov 26 2018


CROSSREFS

Cf. A321543  A321565, A321807  A321836 for similar sequences.
Sequence in context: A024009 A258812 A321556 * A014233 A160964 A022193
Adjacent sequences: A321547 A321548 A321549 * A321551 A321552 A321553


KEYWORD

sign,mult


AUTHOR

N. J. A. Sloane, Nov 23 2018


STATUS

approved



