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

1,1

Links

Table of n, a(n) for n=1..50.

Formula

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

Mathematica

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

Crossrefs

Cf. A107621.

Sequence in context: A356574 A330568 A085596 * A337538 A315809 A168414

Adjacent sequences: A107617 A107618 A107619 * A107621 A107622 A107623

Keyword

easy,nonn

Author

Zak Seidov, May 18 2005

Status

approved