OFFSET
1,2
EXAMPLE
a(17)=20 because A178597(17)=749502, prime(749502)=11373379, and there are 20 primes embedded in 11373379: {3, 7, 11, 13, 17, 31, 71, 79, 97, 113, 131, 179, 317, 797, 971, 11317, 17971, 131797, 317971, 1317971}.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Zak Seidov, May 30 2010
EXTENSIONS
a(18)-a(24) from Donovan Johnson, Jun 10 2010
STATUS
approved