OFFSET
1,1
EXAMPLE
a(4)=47 is a term because sum of digits of three consecutive primes i.e. i.e. (41, 43, 47), whose sum of digits (i.e. 5, 7, 11)is a set of three distinct primes.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, May 18 2005
STATUS
approved