A253052 If, for some m, A098550(m-2) is a prime p and A098550(m) = 3p, add 3p to the sequence.

9, 21, 33, 93, 111, 129, 177, 213, 237, 267, 309, 321, 381, 411, 519, 579, 597, 633, 687, 699, 723, 753, 789, 831, 879, 921, 951, 1047, 1149, 1257, 1299, 1317, 1347, 1401, 1461, 1641, 1713, 1731, 1779, 1797, 1821, 1983, 2031, 2049, 2103, 2181, 2427, 2469

Offset

1,1

Comments

A subsequence of A251544 (and of course of A098550).

Links

Table of n, a(n) for n=1..48.

Crossrefs

Cf. A098550, A251544, A253053, A253054.

Sequence in context: A176258 A107978 A226355 * A043112 A043892 A332019

Adjacent sequences: A253049 A253050 A253051 * A253053 A253054 A253055

Keyword

nonn

Author

N. J. A. Sloane, Jan 01 2015

Status

approved