OFFSET
1,1
LINKS
Carlos Rivera, Prime Puzzle 774. S(i) and Rad(i), The Prime Puzzles and Problems Connection.
EXAMPLE
218 is the sum of proper divisors of 250 and 160, and rad(250) = rad(160) = 10, hence 218 is in the sequence with j=250 and k=160.
Other examples of n and j, k:
For n = 189648, j = 95832, k = 85536.
For n = 720240, j = 288120, k = 246960.
For n = 119967120, j = 38755080, k = 34398000.
For n = 129705984, j = 71614464, k = 60424704.
CROSSREFS
KEYWORD
nonn
AUTHOR
Naohiro Nomoto, Dec 25 2014
EXTENSIONS
a(6) onward from Fred Schneider, Feb 07 2015
STATUS
approved