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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A340770 Indices k of prime numbers such that prime(k)-2 and prime(k)^2-2 are both prime numbers. 1
 3, 4, 6, 8, 14, 18, 27, 34, 65, 82, 99, 141, 172, 177, 191, 202, 216, 226, 319, 333, 337, 445, 470, 476, 496, 552, 559, 564, 578, 602, 637, 672, 829, 850, 863, 871, 949, 1005, 1065, 1075, 1190, 1199, 1231, 1239, 1306, 1329, 1446, 1450, 1529, 1619, 1635, 1643 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This sequence is a subsequence of A107770. LINKS François Marques, Table of n, a(n) for n = 1..10000 EXAMPLE 6 is in the sequence since prime(6)=13 and 13-2=11 and 13^2-2=167 are both prime numbers. PROG (PARI) lista(n) = {my(l=List, k=1); while(#l

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.

Last modified April 18 14:40 EDT 2021. Contains 343088 sequences. (Running on oeis4.)