

A163300


Zero together with the even nonprimes.


20



0, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 128, 130, 132
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OFFSET

1,2


COMMENTS

A163300 U A014076 = A141468.
The nonprime numbers (A018252) begin: 1,4,6,8,9,10,12,14,15,... So the words "prime" and "nonprime" normally refer to the natural numbers or positive integers: 1,2,3,4,5,6,... (Zero is not a member of A018252. See also the definition of A141468).  Omar E. Pol, Aug 04 2009


LINKS

G. C. Greubel, Table of n, a(n) for n = 1..1000


FORMULA

a(n) = 2*A087156(n).
a(n) = 2*{n1+[(n+1) mod n]}, with n>=1.  Paolo P. Lava, Nov 06 2009


MATHEMATICA

Drop[Range[0, 132, 2], {2}] (* Harvey P. Dale, May 05 2012 *)


CROSSREFS

Cf. A014076, A141468, A018252.
Sequence in context: A063127 A272651 A103517 * A193175 A093161 A111305
Adjacent sequences: A163297 A163298 A163299 * A163301 A163302 A163303


KEYWORD

nonn,easy


AUTHOR

JuriStepan Gerasimov, Jul 26 2009


EXTENSIONS

Better definition from Omar E. Pol, Aug 04 2009


STATUS

approved



