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 A321548 a(n) = Sum_{d|n} (-1)^(d-1)*d^9. 2
 1, -511, 19684, -262655, 1953126, -10058524, 40353608, -134480383, 387440173, -998047386, 2357947692, -5170101020, 10604499374, -20620693688, 38445332184, -68853957119, 118587876498, -197981928403, 322687697780, -512998309530, 794320419872, -1204911270612, 1801152661464, -2647111858972 (list; graph; refs; listen; history; text; internal format)
 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), 1-62 (see p. 4 and p. 8). FORMULA G.f.: Sum_{k>=1} (-1)^(k-1)*k^9*x^k/(1 - x^k). - Ilya Gutkovskiy, Dec 23 2018 PROG (PARI) apply( a(n)=sumdiv(n, d, (-1)^(d-1)*d^9), [1..30]) \\ M. F. Hasler, Nov 26 2018 CROSSREFS Cf. A321543 - A321565, A321807 - A321836 for similar sequences. Sequence in context: A024007 A258810 A321554 * A160956 A022191 A069384 Adjacent sequences:  A321545 A321546 A321547 * A321549 A321550 A321551 KEYWORD sign,mult AUTHOR N. J. A. Sloane, Nov 23 2018 STATUS approved

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Last modified January 20 11:06 EST 2020. Contains 331083 sequences. (Running on oeis4.)