OFFSET
1,1
COMMENTS
For purposes of this sequence, the proper divisors of a number include all divisors other than 1 and the number itself. - Harvey P. Dale, Mar 15 2022
LINKS
Charles R Greathouse IV, Table of n, a(n) for n = 1..10000
MATHEMATICA
Total[Rest[Most[Divisors[#]]]]&/@Select[Range[250], PrimeOmega[#]==2&] (* Harvey P. Dale, Mar 15 2022 *)
PROG
(PARI) go(lim)=my(v=List()); forprime(p=2, lim\2, forprime(q=2, min(lim\p, p), listput(v, [p*q, if(q<p, p+q, p)]))); v=vecsort(Vec(v), 1); apply(u->u[2], v) \\ Charles R Greathouse IV, Apr 28 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. J. Mathar, Apr 28 2015
STATUS
approved