login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A055782 Primes q of the form q = 10p + 3, where p is also prime. 6
23, 53, 73, 113, 173, 193, 233, 293, 313, 373, 433, 593, 613, 673, 733, 1013, 1033, 1093, 1373, 1493, 1733, 1913, 1933, 1973, 1993, 2113, 2273, 2293, 2333, 2393, 2633, 2693, 2713, 2833, 3313, 3373, 3533, 3593, 3673, 3733, 3793, 3833, 4013, 4093, 4493 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

These primes correspond to resulting primes for A232210, when A232210(n)=1. - Vladimir Shevelev, Oct 16 2014

LINKS

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

FORMULA

a(n) = 10*A023238(n) + 3. - R. J. Mathar, Sep 21 2009

EXAMPLE

5413 = 541*10 + 3, 3 appended to 541.

MATHEMATICA

Select[Prime@ Range@ 630, PrimeQ[(# - 3)/10] &] (* Michael De Vlieger, Jul 14 2017 *)

PROG

(PARI) lista(nn) = {forprime(p=2, nn, if (isprime(q=10*p+3), print1(q, ", ")); ); } \\ Michel Marcus, Oct 20 2014

CROSSREFS

Cf. A005384, A005385, A023238. Apart from first term, same as A057667.

Sequence in context: A172034 A113912 A327920 * A104802 A128473 A132235

Adjacent sequences:  A055779 A055780 A055781 * A055783 A055784 A055785

KEYWORD

nonn,easy

AUTHOR

Labos Elemer, Jul 13 2000

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 21 11:15 EDT 2019. Contains 328294 sequences. (Running on oeis4.)