A231411 Total number of zero digits in primes less than 10^n.

0, 0, 15, 232, 2725, 30350, 324133, 3386986, 34984325, 358604948, 3657365837, 37164550469, 376613845818, 3808514755978

Offset: 1

Author

Robert Price, Nov 08 2013

Keywords

• nonn
• base
• more

Examples

			a(3)=15, since there are 15 zeros in primes less than 1000.  Namely: 101, 103, 107, 109, 307, 401, 409, 503, 509, 601, 607, 701, 709, 809, 907.
		

Crossrefs

Cf. A231590-A231598, A119290, A119291-A119300.

Cf. A033713.

Programs

Mathematica

Table[Count[IntegerDigits[Prime[Range[PrimePi[10^n-1]]]], 0, 2], {n, 7}] (* Robert Price, Jun 16 2019 *)

Extensions

a(14) from Giovanni Resta, Jul 20 2015