A039998 Primes embedded in prime(n).

1, 1, 1, 1, 1, 2, 2, 1, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 2, 2, 3, 4, 2, 3, 2, 3, 3, 2, 4, 1, 3, 3, 3, 3, 4, 2, 2, 2, 4, 3, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 2, 2, 2, 2, 2, 3, 3, 2, 3, 2, 3, 2, 2, 1, 3, 2, 3, 4, 1, 3, 4, 2, 1, 4, 2, 1, 1, 2, 1, 1, 2, 2, 2, 2, 2, 1, 4, 1, 2, 2, 2, 1, 1, 2, 1, 2, 2, 3

Offset: 1

Author

David W. Wilson

Keywords

• nonn
• base

Comments

a(n) counts permutations of digits of prime(n) which denote primes.

Formula

a(n) = A039999(prime(n)).