A205147 The index jA205146) for which such j exists, and s(k)=prime(k)*prime(k+1).

1, 2, 1, 2, 2, 3, 3, 2, 1, 2, 4, 3, 5, 3, 5, 2, 6, 3, 7, 2, 3, 4, 8, 4, 9, 5, 3, 2, 1, 5, 2, 2, 4, 6, 1, 3, 11, 7, 5, 4, 4, 3, 1, 2, 5, 8, 1, 4, 5, 9, 6, 2, 15, 3, 11, 11, 7, 9, 4, 5

Offset: 1

Author

Clark Kimberling, Jan 25 2012

Keywords

• nonn

Comments

For a guide to related sequences, see A204892.

Crossrefs

Cf. A205146, A204892.

Programs

Mathematica

(See the program at A205146.)