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A144419
Primes of the form prime(k) - 2*k (terms can be repeated).
2
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
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
Sequence in context: A321662 A320176 A298478 * A212322 A367005 A226921
KEYWORD
nonn,changed
AUTHOR
EXTENSIONS
A 181 replaced with 281 by R. J. Mathar, Apr 14 2010
STATUS
approved