A101341 Fibonacci-Fermat numbers.

2, 5, 1597, 229265413057075367692743352179590077832064383222590237

Offset

0,1

Comments

a(4) = 1184388169...3238828317 has 13697 decimal digits. - Alois P. Heinz, Aug 30 2024

Links

Table of n, a(n) for n=0..3.

Formula

a(n) = Fibonacci(2^(2^n)+1) = A000045(A000215(n)).

Prog

(PARI) a(n)=fibonacci(2^(2^n)+1)

Crossrefs

Cf. A000045, A000215.

Sequence in context: A051131 A306785 A119748 * A079014 A215436 A082973

Adjacent sequences: A101338 A101339 A101340 * A101342 A101343 A101344

Keyword

nonn

Author

Jorge Coveiro, Dec 24 2004

Status

approved