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A100717 p^p is highest power of p which divides n, where p is some prime divisor of n. 5
4, 12, 20, 27, 28, 36, 44, 52, 54, 60, 68, 76, 84, 92, 100, 108, 116, 124, 132, 135, 140, 148, 156, 164, 172, 180, 188, 189, 196, 204, 212, 216, 220, 228, 236, 244, 252, 260, 268, 270, 276, 284, 292, 297, 300, 308, 316, 324, 332, 340, 348, 351, 356, 364, 372 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For each prime p, the sequence includes all k*p^p for k such that gcd(k,p)=1. - T. D. Noe

A203908(a(n)) = 0. - Reinhard Zumkeller, Dec 24 2013

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

EXAMPLE

54 is included because 3^3, but not 3^4, divides 54.

MATHEMATICA

fQ[n_] := Union[ Table[ #[[1]] == #[[2]]] & /@ FactorInteger[n]][[ -1]] == True; Select[ Range[2, 375], fQ[ # ] &] (* Robert G. Wilson v, Dec 14 2004 *)

PROG

(Haskell)

a100717 n = a100717_list !! (n-1)

a100717_list = filter ((== 0) . a203908) [1..]

-- Reinhard Zumkeller, Dec 24 2013

CROSSREFS

Cf. A100716.

Cf. A051674 (subsequence).

Sequence in context: A273541 A273215 A273277 * A285526 A321466 A227226

Adjacent sequences:  A100714 A100715 A100716 * A100718 A100719 A100720

KEYWORD

nonn

AUTHOR

Leroy Quet, Dec 10 2004

EXTENSIONS

More terms from T. D. Noe and Robert G. Wilson v, Dec 14 2004

STATUS

approved

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Last modified March 8 13:59 EST 2021. Contains 341949 sequences. (Running on oeis4.)