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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
OFFSET
1,3
COMMENTS
Essentially the same as A002808, A141468, A018252, A065090, A171581 and A056653.
CROSSREFS
Cf. A141468.
Sequence in context: A153276 A298866 A108408 * A171581 A063450 A353684
KEYWORD
nonn,less
AUTHOR
EXTENSIONS
Replaced the 4-fold negation in the definition by a simpler phrase - R. J. Mathar, Mar 05 2010
STATUS
approved