A107621 Primes multiplied alternately by 2 and 3.

4, 9, 10, 21, 22, 39, 34, 57, 46, 87, 62, 111, 82, 129, 94, 159, 118, 183, 134, 213, 146, 237, 166, 267, 194, 303, 206, 321, 218, 339, 254, 393, 274, 417, 298, 453, 314, 489, 334, 519, 358, 543, 382, 579, 394, 597, 422, 669, 454, 687

Offset

1,1

Comments

Cf. A107620 Primes multiplied alternately by 3 and 2.

Links

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

Formula

A107621(n) = prime(n)*(3 - mod(n, 2)).

Mathematica

A107621[n_]:= Prime[n] (3 - Mod[n, 2])

Crossrefs

Cf. A107620.

Sequence in context: A072525 A338906 A367855 * A098144 A109412 A061766

Adjacent sequences: A107618 A107619 A107620 * A107622 A107623 A107624

Keyword

easy,nonn

Author

Zak Seidov, May 18 2005

Status

approved