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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
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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The Lim (x -> inf.) the number of terms < x in A160216/A160215 => 2. [From Robert G. Wilson v, May 31 2009]
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LINKS
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Table of n, a(n) for n=1..56.
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FORMULA
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A000040 \ A160215.
{prime(k) : A023506(k) is odd} - [R. J. Mathar, Mary 08 2009]
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MATHEMATICA
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fQ[n_] := Mod[ Flatten[ FactorInteger[n - 1]] [[2]], 2] == 1; Select[ Prime@ Range@ 90, fQ@# &] [From Robert G. Wilson v, May 31 2009]
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CROSSREFS
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A000040, A160215
Sequence in context: A179481 A131426 A080978 * A181516 A002145 A092109
Adjacent sequences: A160213 A160214 A160215 * A160217 A160218 A160219
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KEYWORD
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nonn
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AUTHOR
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Vladimir Shevelev, May 04 2009
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EXTENSIONS
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Edited by R. J. Mathar, May 08 2009
More terms from Robert G. Wilson v, May 31 2009
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STATUS
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approved
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