

A321547


a(n) = Sum_{dn} (1)^(d1)*d^8.


2



1, 255, 6562, 65791, 390626, 1673310, 5764802, 16843007, 43053283, 99609630, 214358882, 431720542, 815730722, 1470024510, 2563287812, 4311810303, 6975757442, 10978587165, 16983563042, 25699675166, 37828630724, 54661514910, 78310985282, 110523811934, 152588281251, 208011334110
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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^8*x^k/(1  x^k).  Ilya Gutkovskiy, Dec 23 2018


PROG

(PARI) apply( a(n)=sumdiv(n, d, (1)^(d1)*d^8), [1..30]) \\ M. F. Hasler, Nov 26 2018


CROSSREFS

Cf. A321543  A321565, A321807  A321836 for similar sequences.
Sequence in context: A024006 A258809 A321553 * A221970 A177897 A160913
Adjacent sequences: A321544 A321545 A321546 * A321548 A321549 A321550


KEYWORD

sign,mult


AUTHOR

N. J. A. Sloane, Nov 23 2018


STATUS

approved



