A107623 Primes plus alternately 3 and 2.

5, 5, 8, 9, 14, 15, 20, 21, 26, 31, 34, 39, 44, 45, 50, 55, 62, 63, 70, 73, 76, 81, 86, 91, 100, 103, 106, 109, 112, 115, 130, 133, 140, 141, 152, 153, 160, 165, 170, 175, 182, 183, 194, 195, 200, 201, 214, 225, 230, 231, 236, 241, 244, 253, 260, 265, 272, 273

Offset: 1

Author

Zak Seidov, May 18 2005

Keywords

• easy
• nonn

Crossrefs

Cf. A107620, A107621, 107622.

Programs

Mathematica

A107623[n_]:= Prime[n] + (2 + Mod[n, 2])

Formula

A107623(n) = prime(n) + (2 + mod(n, 2)).