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A190385
Numbers with prime factorization pqrs^3t^3.
3
83160, 98280, 128520, 143640, 154440, 173880, 201960, 216216, 219240, 225720, 231000, 234360, 238680, 266760, 273000, 273240, 279720, 282744, 309960, 316008, 322920, 325080, 334152, 344520, 348840, 355320, 357000, 368280, 373464, 382536
OFFSET
1,1
LINKS
MATHEMATICA
f[n_]:=Sort[Last/@FactorInteger[n]]=={1, 1, 1, 3, 3}; Select[Range[600000], f]
PROG
(PARI) list(lim)=my(v=List(), t1, t2, t3, t4); forprime(p=2, sqrtnint(lim\840, 3), t1=p^3; forprime(q=2, sqrtnint(lim\(30*t1), 3), if(q==p, next); t2=q^3*t1; forprime(r=2, lim\(6*t2), if(r==p || r==q, next); t3=r*t2; forprime(s=2, lim\(2*t3), if(s==p || s==q || s==r, next); t4=s*t3; forprime(t=2, lim\t4, if(t==p || t==q || t==r || t==s, next); listput(v, t4*t)))))); Set(v) \\ Charles R Greathouse IV, Aug 25 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved