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
KEYWORD
nonn,changed
AUTHOR
Juri-Stepan Gerasimov, Oct 07 2008
EXTENSIONS
A 181 replaced with 281 by R. J. Mathar, Apr 14 2010
STATUS
approved