A371508 Integers k such that A000045(k) + A004091(k) is prime (A000040).

1, 2, 81, 311, 6887, 9691, 296959

Offset: 1

Author

Gonzalo Martínez, Mar 25 2024

Keywords

• nonn
• base
• more

Examples

			1 is a term since Fibonacci(1) = 1 plus its reversal is 1 + 1 = 2 which is prime (and for the same reason 2 is a term).
81 is a term since Fibonacci(81) = 37889062373143906 plus its reversal is 98823199699242779 which is prime.
		

Crossrefs

Cf. A000040, A000045, A004091, A072366.

Programs

Mathematica

Select[Range[10^4], PrimeQ[(f = Fibonacci[#]) + IntegerReverse[f]] &] (* Amiram Eldar, Mar 25 2024 *)

Extensions

a(7) from Michael S. Branicky, Jan 07 2025