A049510 Numbers k such that prime(k) == 9 (mod 10).

8, 10, 17, 22, 24, 29, 34, 35, 41, 46, 50, 52, 57, 70, 72, 75, 77, 80, 81, 85, 87, 92, 95, 97, 104, 109, 114, 120, 127, 128, 131, 136, 140, 145, 146, 149, 157, 158, 169, 171, 175, 176, 180, 186, 189, 201, 204, 205, 207, 209, 215, 222, 223, 226, 228, 232, 237, 239

Offset

1,1

Comments

The asymptotic density of this sequence is 1/4 (by Dirichlet's theorem). - Amiram Eldar, Mar 01 2021

Links

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

Formula

a(n) = A000720(A030433(n)). - Ray Chandler, Nov 07 2006

Mathematica

Select[Range[240], Mod[Prime[ # ], 10] == 9 &] (* Ray Chandler, Nov 07 2006 *)

Crossrefs

Cf. A000720, A030433, A102700.

Cf. A049508, A049509, A049511.

Sequence in context: A319293 A061908 A056020 * A121846 A059094 A302166

Adjacent sequences: A049507 A049508 A049509 * A049511 A049512 A049513

Keyword

nonn

Author

N. J. A. Sloane

Extensions

Extended by Ray Chandler, Nov 07 2006

Status

approved