OFFSET
1,2
LINKS
P. De Geest, Home Primes
EXAMPLE
15 = 3*5 -> 11*101 -> 11101, so a(15) = 11101.
CROSSREFS
KEYWORD
nonn,easy,base
AUTHOR
N. J. A. Sloane, Oct 31 2001
EXTENSIONS
More terms from Larry Reeves (larryr(AT)acm.org) and Robert G. Wilson v, Nov 01 2001
STATUS
approved