OFFSET
1,2
COMMENTS
PROG
(PARI) {z=105; v=vector(z); for(n=1, z^2, a=sigma(n)-n; if(0<a&&a<=z, v[a]++)); for(j=1, z, if(v[j]>1, print1(j, ", ")))} \\ Klaus Brockhaus, May 26 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, May 02 2009
EXTENSIONS
More terms from Klaus Brockhaus, May 26 2009
STATUS
approved