A082910 a(n) = prime(prime(n+1)-prime(n)).

2, 3, 3, 7, 3, 7, 3, 7, 13, 3, 13, 7, 3, 7, 13, 13, 3, 13, 7, 3, 13, 7, 13, 19, 7, 3, 7, 3, 7, 43, 7, 13, 3, 29, 3, 13, 13, 7, 13, 13, 3, 29, 3, 7, 3, 37, 37, 7, 3, 7, 13, 3, 29, 13, 13, 13, 3, 13, 7, 3, 29, 43, 7, 3, 7, 43, 13, 29, 3, 7, 13, 19, 13, 13, 7, 13, 19, 7, 19, 29, 3, 29, 3, 13, 7, 13

Offset

1,1

Comments

Except for a(1) = 2, only primes of even subscript (i.e. members of A031215) occur.

Links

Table of n, a(n) for n=1..86.

Formula

a(n) = A000040(A001223(n)).

Maple

seq(ithprime(ithprime(n+1)-ithprime(n)), n=1..100); # Robert Israel, Feb 12 2015

Crossrefs

Cf. A000040, A001223, A031215.

Sequence in context: A239472 A234943 A209494 * A023646 A056225 A343390

Adjacent sequences: A082907 A082908 A082909 * A082911 A082912 A082913

Keyword

easy,nonn

Author

Labos Elemer, Apr 23 2003

Extensions

Comment corrected by Robert Israel, Feb 12 2015

Status

approved