A107620 Primes multiplied alternately by 3 and 2.

6, 6, 15, 14, 33, 26, 51, 38, 69, 58, 93, 74, 123, 86, 141, 106, 177, 122, 201, 142, 219, 158, 249, 178, 291, 202, 309, 214, 327, 226, 381, 262, 411, 278, 447, 302, 471, 326, 501, 346, 537, 362, 573, 386, 591, 398, 633, 446, 681, 458

Offset: 1

Author

Zak Seidov, May 18 2005

Keywords

• easy
• nonn

Comments

Cf. A107621 = primes multiplied alternately by 2 and 3.

Crossrefs

Cf. A107621.

Programs

Mathematica

A107620[n_]:= Prime[n] (2 + Mod[n, 2]); Array[A107620, 40]

Formula

A107620(n) = prime(n)*(2 + mod(n, 2)).