login
This site is supported by donations to The OEIS Foundation.

 

Logo

"Email this user" was broken Aug 14 to 9am Aug 16. If you sent someone a message in this period, please send it again.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A158611 0, 1 and the primes. 29
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; text; internal format)
OFFSET

1,3

COMMENTS

Essentially a duplicate of A008578. - N. J. A. Sloane, Mar 27 2009

Or, nonnegative noncomposite numbers. - Juri-Stepan Gerasimov, Nov 22 2009, Dec 12 2009

Numbers with all divisors in arithmetic progression. - Charles R Greathouse IV, Oct 19 2015

LINKS

Table of n, a(n) for n=1..58.

FORMULA

a(n) = A008578(n-1), n>1.

MATHEMATICA

Join[{0, 1}, Table[Prime[n], {n, 400}]] (* Vladimir Joseph Stephan Orlovsky, Feb 04 2012 *)

PROG

(PARI) a(n)=if(n<3, n-1, prime(n-2)) \\ Charles R Greathouse IV, Aug 26 2011

(MAGMA) [0, 1] cat [NthPrime(n): n in [1..100]]; // Vincenzo Librandi, Dec 08 2015

CROSSREFS

A158611 U A002808 = A141468 U A000040 = A001477. - Juri-Stepan Gerasimov, Sep 27 2009

Cf. A008578.

Sequence in context: A055398 A070159 * A226159 A182986 A000040 A008578

Adjacent sequences:  A158608 A158609 A158610 * A158612 A158613 A158614

KEYWORD

nonn,easy

AUTHOR

Jaroslav Krizek, Mar 22 2009

EXTENSIONS

Edited by R. J. Mathar, Aug 21 2009

Further edited by R. J. Mathar, Klaus Brockhaus and N. J. A. Sloane, Sep 13 2009

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified August 18 03:14 EDT 2017. Contains 290682 sequences.