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!)
A340759 Primes p such that 2*p+3*q is prime, where q is the next prime after p. 1
2, 5, 7, 11, 19, 29, 31, 37, 41, 43, 53, 67, 73, 83, 107, 109, 113, 127, 131, 137, 149, 151, 163, 167, 173, 193, 197, 199, 211, 239, 257, 271, 317, 347, 353, 379, 383, 397, 401, 431, 439, 449, 457, 461, 467, 487, 557, 563, 569, 587, 599, 601, 647, 659, 701, 743, 757, 773, 797, 809, 821, 823, 863 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

EXAMPLE

a(3)=7 is a term because 7 and 11 are consecutive primes and 2*7+3*11 = 47 is prime.

MAPLE

P:= [seq(ithprime(i), i=1..1000)]:

P[select(i -> isprime(2*P[i]+3*P[i+1]), [$1..999])];

CROSSREFS

Cf. A151800.

Sequence in context: A045351 A051645 A116635 * A252280 A184774 A038884

Adjacent sequences:  A340756 A340757 A340758 * A340760 A340761 A340762

KEYWORD

nonn

AUTHOR

J. M. Bergot and Robert Israel, Jan 19 2021

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 November 27 09:19 EST 2021. Contains 349365 sequences. (Running on oeis4.)