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Final digit of the (10^n)-th prime.
1

%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