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

1,1

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

Mathematica

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

Prog

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

Crossrefs

Subsequence of A065091, A007401, and A085837.

Sequence in context: A158942 A310192 A138152 * A249373 A180346 A020632

Adjacent sequences: A004136 A004137 A004138 * A004140 A004141 A004142

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved