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A114130 - OEIS
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Numbers whose factorization involves only prime exponents, all different, and no number appears both as an exponent and as a prime factor.
2

%I #15 Mar 29 2021 05:25:55

%S 8,9,25,32,49,121,125,128,169,243,289,343,361,529,841,961,1331,1369,

%T 1681,1849,2048,2187,2197,2209,2809,3481,3721,4489,4913,5041,5329,

%U 6125,6241,6859,6889,7921,8192,8575,9409,10201,10609,10976,11449,11881,11907

%N Numbers whose factorization involves only prime exponents, all different, and no number appears both as an exponent and as a prime factor.

%H Harvey P. Dale, <a href="/A114130/b114130.txt">Table of n, a(n) for n = 1..560</a>

%t pedQ[n_]:=Module[{fi=Transpose[FactorInteger[n]],a,b},a=fi[[1]];b = fi[[2]]; AllTrue[b,PrimeQ]&&Length[b]==Length[Union[b]]&&Intersection[ a,b]=={}]; Select[Range[12000],pedQ] (* The program uses the AllTrue function from Mathematica version 10 *) (* _Harvey P. Dale_, Jan 24 2015 *)

%Y Subsequence of A062307.

%K nonn

%O 1,1

%A _Jon Wild_, Feb 14 2006