OFFSET
1,1
REFERENCES
Arie Groeneveld, Posting to Sequence Fans Mailing List, Feb 06, 2011
PROG
(PARI) forstep(n=2, 33550336, 2, d=divisors(n); s=0; for(j=1, numdiv(n), s=s+2*d[j]; if(s>=n, if(s==n, print1(n ", ")); next(2)))) \\ Donovan Johnson, Jan 24 2014
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Feb 07 2011
EXTENSIONS
a(14)-a(22) from Donovan Johnson, Feb 10 2011
a(23)-a(24) from Donovan Johnson, Jan 24 2014
STATUS
approved