A117529 Indices of Fibonacci numbers with 14 distinct prime factors.

168, 216, 294, 308, 348, 465, 530, 544, 657, 675, 824, 915, 927, 976, 1015, 1016, 1023, 1029, 1096, 1112, 1145, 1185

Offset: 1

Author

Ryan Propper, Apr 26 2006

Keywords

• hard
• more
• nonn

Examples

			F(168) = 2^5 * 3^2 * 7^2 * 13 * 23 * 29 * 83 * 167 * 211 * 281 * 421 * 1427 * 14503 * 65740583 has 14 distinct prime factors, so 168 is in the sequence.
		

Links

• Blair Kelly, Fibonacci and Lucas Factorizations.

Crossrefs

Cf. A114823-A114826, A114836-A114841.

Column k=14 of A303217.

Programs

Mathematica

Position[PrimeNu[Fibonacci[Range[1200]]],14]//Flatten (* The program may take a long time to run *) (* Harvey P. Dale, Apr 27 2018 *)

Extensions

a(15)-a(22) from Max Alekseyev, Aug 18 2013