
3, 7, 11, 19, 23, 31, 41, 43, 47, 59, 67, 71, 73, 79, 83, 89, 97, 103, 107, 127, 131, 137, 139, 151, 163, 167, 179, 191, 199, 211, 223, 227, 233, 239, 251, 263, 271, 281, 283, 307, 311, 313, 331, 347, 353, 359, 367, 379, 383, 409, 419, 431, 439, 443, 457, 463
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OFFSET

1,1


COMMENTS

The Lim (x > inf.) the number of terms < x in A160216/A160215 => 2. [From Robert G. Wilson v, May 31 2009]


LINKS

Table of n, a(n) for n=1..56.


FORMULA

A000040 \ A160215.
{prime(k) : A023506(k) is odd}  [R. J. Mathar, Mary 08 2009]


MATHEMATICA

fQ[n_] := Mod[ Flatten[ FactorInteger[n  1]] [[2]], 2] == 1; Select[ Prime@ Range@ 90, fQ@# &] [From Robert G. Wilson v, May 31 2009]


CROSSREFS

A000040, A160215
Sequence in context: A179481 A131426 A080978 * A181516 A002145 A092109
Adjacent sequences: A160213 A160214 A160215 * A160217 A160218 A160219


KEYWORD

nonn


AUTHOR

Vladimir Shevelev, May 04 2009


EXTENSIONS

Edited by R. J. Mathar, May 08 2009
More terms from Robert G. Wilson v, May 31 2009


STATUS

approved

