A089538 A085747 indexed by A000040.

2, 1, 2, 0, 0, 0, 0, 0, 3, 0, 2, 7, 0, 0, 4, 1, 2, 9, 0, 0, 5, 10, 2, 0, 0, 0, 12, 0, 13, 1, 8, 5, 5, 0, 4, 2, 13, 0, 6, 31, 15, 17, 1, 12, 3, 12, 17, 0, 1, 21, 17, 22, 21, 0, 0, 18, 0, 12, 0, 18, 11, 12, 14, 4, 23, 20, 8, 4, 27, 8, 0, 28, 12, 39, 0, 27, 2, 21, 29, 25

Offset: 1

Author

Ray Chandler, Nov 09 2003

Keywords

• nonn

Crossrefs

Cf. A085747, A089539, A089540, A089541.

Formula

a(n)=k such that A085747(n)=A000040(k) if A085747(n) is prime, otherwise 0.

Extensions

More terms from Max Alekseyev, Jun 17 2011