A037070 - OEIS

%I #14 Apr 03 2023 10:36:09

%S 1,8,46,303,5133,17984,216816,1270607,41146179,420243162,2524038155,

%T 36159205628,343392568900,1955010428258

%N a(n)-th prime is the smallest prime containing exactly n 9's.

%H Andrew R. Booker, <a href="https://t5k.org/nthprime/">The Nth Prime Page</a>

%t (* see A037071 for f *) PrimePi[ Table[ f[n, 9], {n, 1, 13}]]

%Y Cf. A037071, A034388.

%K nonn,base,hard

%O 0,2

%A _Patrick De Geest_, Jan 04 1999

%E One more term from _Vladeta Jovovic_, Jan 10 2002

%E a(0)=1 prepended by _Sean A. Irvine_, Dec 06 2020