A078308 - OEIS

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A078308

Sum_{d divides n} d^(n/d+1).

1, 5, 10, 25, 26, 80, 50, 161, 163, 290, 122, 988, 170, 796, 1580, 2305, 290, 5561, 362, 10670, 9404, 5912, 530, 58436, 16251, 19258, 66340, 118640, 842, 381740, 962, 431105, 547172, 268214, 509500, 3534037, 1370, 1056880, 4813052, 8616326, 1682 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`G.f.: Sum{n>0} n^2x^n/(1-nx^n).`
	MAPLE	`A078308 := proc(n)` `add( d^(n/d+1), d=numtheory[divisors](n)) ;` `end proc:` `seq(A078308(n), n=1..10) ; # R. J. Mathar, Dec 14 2011`
	CROSSREFS	`Cf. A055225, A006906.` `Sequence in context: A037240 A177432 A166635 * A083493 A061259 A072421` `Adjacent sequences: A078305 A078306 A078307 * A078309 A078310 A078311`
	KEYWORD	`nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Nov 22 2002`

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Last modified February 15 23:21 EST 2012. Contains 205860 sequences.