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A253052 If, for some m, A098550(m-2) is a prime p and A098550(m) = 3p, add 3p to the sequence. 3
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 6 11:48 EST 2021. Contains 349563 sequences. (Running on oeis4.)