A004139 Odd primes excluding 5.

3, 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

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Comments

Subsequence of A007401. - Reinhard Zumkeller, Jul 18 2011

Primes not dividing 10. Therefore primes p for which the decimal expansion of 1/p does not terminate (primes in A085837). - Jeppe Stig Nielsen, Dec 15 2019

References

• John H. Conway, R. K. Guy, The Book of Numbers, Copernicus Press, p. 162.

Links

• Michael De Vlieger, Table of n, a(n) for n = 1..10000

Crossrefs

Subsequence of A065091, A007401, and A085837.

Programs

Mathematica

Prime@ Delete[Range[2, 53], {2}] (* Michael De Vlieger, Dec 15 2019 *)

PARI

a(n)=if(n>1,prime(n+2),3) \\ Charles R Greathouse IV, Aug 26 2011