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A171993 Numbers that are neither prime nor multiples of 3. 2
1, 4, 8, 10, 14, 16, 20, 22, 25, 26, 28, 32, 34, 35, 38, 40, 44, 46, 49, 50, 52, 55, 56, 58, 62, 64, 65, 68, 70, 74, 76, 77, 80, 82, 85, 86, 88, 91, 92, 94, 95, 98, 100, 104, 106, 110, 112, 115, 116, 118, 119, 121, 122, 124, 125, 128, 130, 133, 134, 136, 140, 142, 143 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

1 together with composite numbers that are not multiples of 3.

LINKS

Table of n, a(n) for n=1..63.

FORMULA

a(n) = A157695(n-1), n>1. [From R. J. Mathar, Feb 07 2010]

a(n) ~ 1.5n.

CROSSREFS

Cf. A018252, A157695.

Sequence in context: A342734 A092292 A299482 * A157695 A175228 A099861

Adjacent sequences:  A171990 A171991 A171992 * A171994 A171995 A171996

KEYWORD

nonn,less

AUTHOR

Juri-Stepan Gerasimov, Jan 21 2010

EXTENSIONS

Edited by Charles R Greathouse IV, Mar 19 2010

STATUS

approved

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Last modified October 17 17:21 EDT 2021. Contains 348065 sequences. (Running on oeis4.)