A039994 Primes embedded in prime(n) as subsequences.

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, 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, 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

Offset

1,6

Links

Table of n, a(n) for n=1..105.

Formula

a(n) = A039995(prime(n)).

Example

a(26) = 2 since "101" has two prime subsequences, 101 and 11.

Crossrefs

Different from A039996.

Sequence in context: A111709 A348911 A039996 * A348485 A343188 A326394

Adjacent sequences: A039991 A039992 A039993 * A039995 A039996 A039997

Keyword

nonn,base

Author

David W. Wilson

Status

approved