A275368 Numbers k such that A000032(k) + 2^k is a prime.

0, 1, 2, 4, 5, 7, 13, 22, 52, 53, 85, 175, 214, 223, 556, 631

Offset: 1

Author

Vincenzo Librandi, Jul 25 2016

Keywords

• nonn
• more

Comments

Next term > 10^5. - Joerg Arndt, Jul 25 2016

Crossrefs

Cf. A000032, A088859.

Programs

Magma

[n: n in [1..7000] | IsPrime(Lucas(n)+2^n)];

Mathematica

Select[Range[0, 7000], PrimeQ[LucasL[#] + 2^#] &]

PARI

isok(n) = isprime(fibonacci(n-1)+fibonacci(n+1)+2^n); \\ Altug Alkan, Jul 25 2016