A045719 - OEIS

%I #7 May 18 2013 16:49:24

%S 0,0,0,0,0,2,2,0,2,1,2,3,0,1,1,2,1,0,1,2,3,2,1,0,2,1,3,4,1,6,5,6,10,5,

%T 5,2,6,6,7,10,9,2,3,5,9,3,2,3,2,2,3,5,3,3,3,3,2,5,3,2,5,5,4,6,4,10,4,

%U 6,7,3,3,6,6,6,9,2,5,9,1,0,5,3,5,2,3,2,0,4,3,3,4,5,2,5,0,3,2,3,5,2,4,2,4,3,6,3

%N Number of primes embedded in n-th prime.

%C a(n) counts permuted subsequences of digits of prime(n) which denote primes distinct from prime(n).

%e For example a(11)=3 because 37 generate 3 primes with its digits: 3, 7, 73

%Y Cf. A000040.

%K nonn,base

%O 1,6

%A _Felice Russo_

%E More terms from _David W. Wilson_