A050454 - OEIS

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A050454

Sum_{d|n, d=3 mod 4} d^3.

0, 0, 27, 0, 0, 27, 343, 0, 27, 0, 1331, 27, 0, 343, 3402, 0, 0, 27, 6859, 0, 370, 1331, 12167, 27, 0, 0, 19710, 343, 0, 3402, 29791, 0, 1358, 0, 43218, 27, 0, 6859, 59346, 0, 0, 370, 79507, 1331, 3402, 12167, 103823, 27, 343, 0, 132678, 0, 0 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,3`
	MAPLE	`A050454 := proc(n) local a, d; a := 0 ; for d in numtheory[divisors](n) do if d mod 4 = 3 then a := a+d^3 ; end if; end do; a ; end proc:` `seq(A050454(n), n=1..100) ; # R. J. Mathar, Jan 07 2011`
	CROSSREFS	`Sequence in context: A034246 A145336 A005084 * A178737 A005067 A076108` `Adjacent sequences: A050451 A050452 A050453 * A050455 A050456 A050457`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Dec 23 1999`

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Last modified February 16 05:51 EST 2012. Contains 205860 sequences.