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A173905 {2,3} and the nonprimes A141468. 0
0, 1, 2, 3, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Essentially the same as A002808, A141468, A018252, A065090, A171581 and A056653.

LINKS

Table of n, a(n) for n=1..72.

CROSSREFS

Cf. A141468.

Sequence in context: A153276 A298866 A108408 * A171581 A063450 A047229

Adjacent sequences:  A173902 A173903 A173904 * A173906 A173907 A173908

KEYWORD

nonn,less

AUTHOR

Juri-Stepan Gerasimov, Mar 02 2010

EXTENSIONS

Replaced the 4-fold negation in the definition by a simpler phrase - R. J. Mathar, Mar 05 2010

STATUS

approved

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Last modified August 10 04:38 EDT 2020. Contains 336368 sequences. (Running on oeis4.)