login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A254672 Primes prime(n) such that prime(n) + 6*n is also prime. 2
5, 7, 11, 17, 19, 29, 31, 37, 43, 47, 53, 67, 71, 73, 79, 89, 101, 109, 113, 127, 149, 151, 157, 167, 181, 191, 193, 197, 227, 257, 263, 271, 277, 281, 331, 347, 349, 379, 383, 431, 433, 449, 467, 479, 499, 509, 521, 523, 547, 563, 569, 571, 577, 587, 619, 631 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

EXAMPLE

prime(5) = 11 is in the sequence because 11 + 6*5 = 41 is prime.

prime(8) = 19 is in the sequence because 19 + 6*8 = 67 is prime.

MATHEMATICA

Prime[Select[Range[150], PrimeQ[Prime[#] + 6 #] &]]

PROG

(MAGMA) [NthPrime(n): n in [1..200] | IsPrime(NthPrime(n)+6*n)]

CROSSREFS

Cf. A061067, A231232, A231383, A254462, A254665, A254673.

Sequence in context: A106863 A200569 A110016 * A056775 A015917 A046133

Adjacent sequences:  A254669 A254670 A254671 * A254673 A254674 A254675

KEYWORD

nonn

AUTHOR

Vincenzo Librandi, Feb 05 2015

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 May 17 16:03 EDT 2021. Contains 343980 sequences. (Running on oeis4.)