OFFSET
1,2
FORMULA
PROG
(PARI) lista(nn) = {a = 1; print1(a, ", "); for (n = 1, nn, sa = sigma(a); a++; while (sigma(a) % sa, a++); print1(sigma(a), ", "); ); } \\ Michel Marcus, Oct 12 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Dec 09 2003
EXTENSIONS
Corrected and extended by David Wasserman, Jan 04 2006
STATUS
approved