login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A064029 Numbers n such that sopfr(n) = ud(n), where sopfr = A001414 and ud(n) = A034444. 0

%I

%S 2,5460,9240,253890,358050,387090,395850,429660,440895,458850,468930,

%T 475020,529074,550620,574770,629850,669900,755820,788970

%N Numbers n such that sopfr(n) = ud(n), where sopfr = A001414 and ud(n) = A034444.

%o (PARI) sopfr(n, s,fac,i) = fac=factor(n); for(i=1,matsize(fac)[1], s=s+fac[i,1]*fac[i,2]); return(s); ud(n) = 2^omega(n); for(n=1,10^6, if(sopfr(n)==ud(n),print(n)))

%K more,nonn

%O 1,1

%A _Jason Earls_, Sep 12 2001

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 25 10:41 EDT 2019. Contains 326324 sequences. (Running on oeis4.)