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A058274 An approximation to sigma_{5/2}(n): ceiling( sum_{d|n} d^(5/2) ). 0
1, 7, 17, 39, 57, 111, 131, 220, 260, 379, 403, 642, 611, 870, 944, 1244, 1193, 1729, 1575, 2200, 2168, 2679, 2538, 3645, 3182, 4063, 4048, 5051, 4530, 6284, 5352, 7037, 6674, 7939, 7434, 10035, 8329, 10482, 10125, 12500, 10765, 14427 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..42.

MAPLE

f := proc(n) local d, t1, t2; t2 := 0; t1 := divisors(n); for d in t1 do t2 := t2 + d^(5/2) end do; t2; end proc; # exact value of sigma_{5/2}(n)

CROSSREFS

Sequence in context: A298369 A213789 A058273 * A322597 A193214 A184862

Adjacent sequences:  A058271 A058272 A058273 * A058275 A058276 A058277

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 08 2000

STATUS

approved

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Last modified June 19 05:09 EDT 2021. Contains 345125 sequences. (Running on oeis4.)