%I #9 Mar 24 2021 08:06:31
%S 2,9,1,9,9,9,3,3,3,9,3,7,3,1,7,7,9,9,1,9,7,3,9,3,3
%N Final digit of the (10^n)-th prime.
%F a(n) = A010879(A006988(n)).
%o (PARI) a(n)=prime(10^n)%10 \\ _Charles R Greathouse IV_, Dec 29 2012
%Y Cf. A006988, A010879.
%K nonn,base,hard,more
%O 0,1
%A _Cino Hilliard_, Jun 21 2004
%E a(19)-a(24) added from the b-file at A006988 by _Amiram Eldar_, Mar 24 2021