OFFSET
1,2
FORMULA
a(n) ~ 10^n. - Charles R Greathouse IV, May 21 2014
EXAMPLE
a(2)=9 because there are 9 primes not greater than 547 (the 100th prime) that contain a zero digit. Namely: 101, 103, 107, 109, 307, 401, 409, 503, 509.
MATHEMATICA
cnt = 0; Table[Do[p = Prime[k]; If[MemberQ[IntegerDigits[p], 0], cnt++], {k, 10^(n - 1) + 1, 10^n}]; cnt, {n, 5}] (* T. D. Noe, Nov 13 2013 *)
CROSSREFS
KEYWORD
more,nonn,base
AUTHOR
Robert Price, Nov 12 2013
STATUS
approved