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A049510 Numbers k such that prime(k) == 9 (mod 10). 5
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 9 20:59 EDT 2021. Contains 343746 sequences. (Running on oeis4.)