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A189985
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Numbers with prime factorization pqrstu^2.
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2
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60060, 78540, 87780, 90090, 92820, 103740, 106260, 117810, 125580, 131670, 133980, 135660, 139230, 143220, 145860, 150150, 155610, 158340, 159390, 163020, 164220, 169260, 170940, 183540, 188370, 189420, 196350, 197340, 198660, 200970
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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f[n_]:=Sort[Last/@FactorInteger[n]]=={1, 1, 1, 1, 1, 2}; Select[Range[300000], f]
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PROG
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(PARI) list(lim)=my(v=List(), t1, t2, t3, t4, t5); forprime(p=2, sqrtint(lim\2310), t1=p^2; forprime(q=2, lim\(210*t1), if(q==p, next); t2=q*t1; forprime(r=2, lim\(30*t2), if(r==p || r==q, next); t3=r*t2; forprime(s=2, lim\(6*t3), if(s==p || s==q || s==r, next); t4=s*t3; forprime(t=2, lim\(2*t4), if(t==p || t==q || t==r || t==s, next); t5=t*t4; forprime(u=2, lim\t5, if(u==p || u==q || u==r || u==s || u==t, next); listput(v, t5*u))))))); Set(v) \\ Charles R Greathouse IV, Aug 25 2016
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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