OFFSET
1,3
LINKS
Ray Chandler, Table of n, a(n) for n = 1..110
EXAMPLE
n=12 -> '1100' contains two substrings representing distinct primes: '10'=2 and '11'=3, therefore 12 is a term.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Dec 08 2002
EXTENSIONS
Extended by Ray Chandler, Nov 03 2008
STATUS
approved