%I #12 Jun 03 2024 18:09:34
%S 1,1,1,1,1,2,2,1,3,2,2,3,1,2,2,3,2,1,2,2,3,2,2,1,2,2,3,3,2,4,4,5,6,4,
%T 2,3,4,3,4,6,5,2,3,4,5,2,3,4,3,3,4,5,3,3,4,4,3,4,3,2,5,5,4,4,4,6,3,4,
%U 5,2,4,4,5,5,5,3,3,5,2,1,3,3,5,3,3,3,1,4,3,3,4,4,3,2,1,4,3,3,6,3,4,3,4,3,4
%N Number of primes embedded in decimal expansion of prime(n) as substrings.
%F a(n) = A039995(prime(n)).
%e a(26) = 2 since prime(26) = 101 and "101" has two prime subsequences, 101 and 11.
%Y Cf. A039995.
%Y Different from A039996.
%K nonn,base
%O 1,6
%A _David W. Wilson_
%E Definition and example clarified by _N. J. A. Sloane_, Jun 03 2024