A064525 Smallest Fibonacci number with a prime number of decimal digits.

13, 144, 10946, 1346269, 12586269025, 1548008755920, 14472334024676221, 1100087778366101931, 10284720757613717413913, 11825896447871834976429068427, 1454489111232772683678306641953

Offset

1,1

Links

Table of n, a(n) for n=1..11.

Example

13 is the first Fibonacci with 2 decimal digits. 144 is the first Fibonacci with 3 decimal digits, etc.

Mathematica

Module[{nn=500, fibs}, fibs=Fibonacci[Range[nn]]; Table[SelectFirst[fibs, IntegerLength[ #]==n&], {n, Prime[Range[11]]}]] (* Harvey P. Dale, Dec 16 2018 *)

Crossrefs

Sequence in context: A045725 A072351 A134489 * A065411 A354466 A038492

Adjacent sequences: A064522 A064523 A064524 * A064526 A064527 A064528

Keyword

base,easy,nonn

Author

Jason Earls, Oct 07 2001

Status

approved