OFFSET
1,1
EXAMPLE
At a(3)=431 there are 431 9's digits in the first 10^3 = 1000 primes.
MAPLE
A119300 := proc(n) option remember: local k, s, lim: if(n=0)then return 0:fi: lim:=10^n: s:=procname(n-1): for k from 10^(n-1)+1 to lim do s:=s+nops([SearchAll("9", convert(ithprime(k), string))]): od: return s: end: seq(A119300(n), n=1..4); # Nathaniel Johnston, May 09 2011
MATHEMATICA
cnt=0; k=0; Table[While[k++; cnt=cnt+DigitCount[Prime[k], 10, 9]; k < 10^n]; cnt, {n, 5}] (* T. D. Noe, May 10 2011 *)
CROSSREFS
KEYWORD
more,nonn,base
AUTHOR
Enoch Haga, May 13 2006
EXTENSIONS
a(8)-a(11) from Robert Price, Nov 05 2013
a(12) from Marek Hubal, Mar 04 2019
STATUS
approved