A144419 Primes of the form prime(k) - 2*k (terms can be repeated).

3, 3, 5, 13, 17, 29, 31, 31, 37, 41, 47, 53, 67, 71, 71, 79, 79, 83, 89, 97, 97, 107, 107, 127, 131, 151, 181, 197, 211, 229, 241, 257, 257, 269, 271, 281, 283, 283, 311, 353, 373, 389, 401, 409, 409, 419, 419, 431, 449, 463, 479, 491, 499, 547, 563, 577, 577

Offset

1,1

Links

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

Example

For k=7,  prime(7)  - 2*7  = 17 - 14 =  3 = a(1).
For k=8,  prime(8)  - 2*8  =  9 - 16 =  3 = a(2).
For k=9,  prime(9)  - 2*9  = 23 - 18 =  5 = a(3).
For k=12, prime(12) - 2*12 = 37 - 24 = 13 = a(4).
For k=15, prime(15) - 2*15 = 47 - 30 = 17 = a(5).
For k=19, prime(19) - 2*19 = 67 - 38 = 29 = a(6).
For k=20, prime(20) - 2*20 = 71 - 40 = 31 = a(7).

Maple

select(isprime, [seq(ithprime(k)-2*k, k=1..1000)]); # Robert Israel, Nov 24 2024

Crossrefs

Cf. A000040, A179437.

Sequence in context: A321662 A320176 A298478 * A212322 A367005 A226921

Adjacent sequences: A144416 A144417 A144418 * A144420 A144421 A144422

Keyword

nonn

Author

Juri-Stepan Gerasimov, Oct 07 2008

Extensions

A 181 replaced with 281 by R. J. Mathar, Apr 14 2010

Status

approved