A028886 Primes of the form k^2 - 8.

17, 41, 73, 113, 281, 353, 433, 521, 617, 953, 1217, 1361, 2017, 2393, 2593, 2801, 4217, 4481, 6553, 7561, 8273, 8641, 10193, 10601, 13217, 13681, 14153, 14633, 15121, 16633, 17681, 18217, 20441, 21017, 21601, 22193, 25913, 26561, 29921

Offset: 1

Author

Patrick De Geest

Keywords

• nonn
• easy

Comments

Primes of A028884. Also subsequence of A038873. - Klaus Purath, Jan 28 2020

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..8000
• Patrick De Geest, Palindromic Quasipronics of the form n(n+x)

Crossrefs

Cf. A028884, A038873.

Programs

Magma

[a: n in [3..300] | IsPrime(a) where a is n^2-8]; // Vincenzo Librandi, Dec 01 2011

Mathematica

Select[Range[3,1000]^2-8,PrimeQ] (* Vincenzo Librandi, Dec 01 2011 *)