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A158611
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0, 1 and the primes.
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27
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0, 1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Essentially a duplicate of A008578. - N. J. A. Sloane, Mar 27 2009
Or, nonnegative non-composite numbers. [From Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Nov 22 2009, Dec 12 2009]
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FORMULA
| a(n) = A008578(n-1), n>1.
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MATHEMATICA
| Join[{0, 1}, Table[Prime[n], {n, 400}]] (* From Vladimir Joseph Stephan Orlovsky, Feb 04 2012 *)
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PROG
| (PARI) a(n)=if(n<3, n-1, prime(n-2)) \\ Charles R Greathouse IV, Aug 26 2011
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CROSSREFS
| A158611 U A002808 = A141468 U A000040 = A001477. - Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Sep 27 2009
Cf. A008578.
Sequence in context: A052424 A055398 A070159 * A182986 A000040 A008578
Adjacent sequences: A158608 A158609 A158610 * A158612 A158613 A158614
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KEYWORD
| nonn,easy,changed
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AUTHOR
| Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), Mar 22 2009
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EXTENSIONS
| Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 21 2009
Further edited by R. J. Mathar, Klaus Brockhaus and N. J. A. Sloane, Sep 13 2009
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