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A049508 Numbers k such that prime(k) == 3 (mod 10). 7
2, 6, 9, 14, 16, 21, 23, 27, 30, 38, 40, 44, 48, 51, 56, 61, 62, 65, 71, 74, 76, 84, 86, 90, 96, 99, 103, 108, 112, 117, 119, 122, 124, 130, 132, 137, 143, 147, 150, 153, 162, 166, 170, 174, 179, 183, 185, 188, 191, 192, 196, 198, 200, 208, 213, 220, 224, 227, 231 (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..59.

FORMULA

a(n) = A000720(A030431(n)). - Ray Chandler, Nov 07 2006

MATHEMATICA

Select[Range[240], Mod[Prime[ # ], 10] == 3 &] (* Ray Chandler, Nov 07 2006 *)

CROSSREFS

Cf. A000720, A030431, A102338.

Cf. A049509, A049510, A049511.

Sequence in context: A226823 A171866 A297833 * A184824 A184836 A327895

Adjacent sequences:  A049505 A049506 A049507 * A049509 A049510 A049511

KEYWORD

easy,nonn

AUTHOR

J. Lowell

EXTENSIONS

Edited and extended by Ray Chandler, Nov 07 2006

STATUS

approved

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Last modified June 13 05:41 EDT 2021. Contains 344981 sequences. (Running on oeis4.)