A207990 Primes of the form prime(n) + prime(n+1) - 5.

3, 7, 13, 19, 31, 37, 47, 73, 79, 107, 139, 157, 167, 181, 193, 199, 211, 263, 271, 283, 347, 367, 379, 457, 467, 487, 503, 571, 613, 619, 643, 691, 757, 823, 859, 877, 887, 919, 941, 997, 1039, 1187, 1231, 1279, 1307, 1423, 1489, 1579, 1601, 1627, 1663

Offset: 1

Author

Vladimir Joseph Stephan Orlovsky, Feb 22 2012

Keywords

• nonn
• less

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..3000

Crossrefs

Cf. A072669, A092738.

Programs

Mathematica

Select[Table[Prime[n] + Prime[n + 1] - 5, {n, 200}], PrimeQ]
Select[Total/@Partition[Prime[Range[200]],2,1]-5,PrimeQ] (* Harvey P. Dale, Apr 05 2020 *)

PARI

p=2;forprime(q=3,1e4,if(isprime(t=p+q-5),print1(t", "));p=q) \\ Charles R Greathouse IV, Apr 13 2012