



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, 269, 271, 277, 281
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OFFSET

1,1


COMMENTS

Or, prime sums of primes (without repetition).
Or, smallest prime > nth odd prime.
Or, primes p such that p*(p+1)/21 is a composite.
Note that p*(p+1)/21 = (1/2)*(p  1)*(p + 2), also 3*(3+1)/21 = 5.  Joerg Arndt, Jan 12 2011.
The inclusion of this sequence in the OEIS is justified by the fact that a number of other sequences can be more simply described using it, and also so that Superseeker can make use of it.  N. J. A. Sloane, Aug 24 2012
Also level number where the total number of faces is increased by 4 in the perspective view of the stepped pyramid described in A245092.  Omar E. Pol, Mar 20 2019


LINKS

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


FORMULA

a(n) = A000040(n+2).  Omar E. Pol, Mar 20 2019


PROG

(PARI) a(n)=prime(n+2) \\ Charles R Greathouse IV, Aug 26 2011
(PARI) vecextract(primes(52), "3..") \\ Charles R Greathouse IV, Aug 26 2011


CROSSREFS

Cf. A000040, A237593, A245092.
Sequence in context: A066047 A140475 A171577 * A175212 A240710 A115232
Adjacent sequences: A215845 A215846 A215847 * A215849 A215850 A215851


KEYWORD

nonn,easy


AUTHOR

JuriStepan Gerasimov , Nov 29 2009


EXTENSIONS

Entries checked by R. J. Mathar, Mar 18 2010


STATUS

approved



