OFFSET
1,1
COMMENTS
No term is a multiple of 2, 3, or 5. (In fact, a(1) through a(4) are prime.) The decimal expansion of each corresponding prime is n 9's with n's decimal expansion concatenated. Probable primes found by PrimeForm. Primes for 307 and 1759 proved by Primo. No more terms up to 30000.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Rick L. Shepherd, Apr 16 2010
STATUS
approved