A114840 Indices of Fibonacci numbers with 5 distinct prime factors.

30, 36, 42, 44, 45, 50, 57, 63, 66, 68, 69, 75, 76, 98, 111, 118, 124, 134, 141, 153, 169, 172, 183, 185, 201, 202, 203, 213, 218, 229, 247, 253, 267, 302, 303, 329, 335, 347, 363, 371, 373, 377, 381, 382, 386, 395, 398, 413, 415, 439, 443, 461

Offset: 1

Author

Shyam Sunder Gupta, Feb 19 2006

Keywords

• nonn

Examples

			a(1)=30 because 30th Fibonacci number consists of 5 distinct prime factors (i.e., 832040 = 2^3 * 5 * 11 * 31 * 61).
		

Links

• Amiram Eldar, Table of n, a(n) for n = 1..116 (terms 1..106 from Max Alekseyev)
• Blair Kelly, Fibonacci and Lucas Factorizations.

Crossrefs

Cf. A114823-A114826, A114836-A114841.

Column k=5 of A303217.

Programs

PARI

n=1;while(n<305,if(omega(fibonacci(n))==5,print1(n,", "));n++)

Formula

{n: A022307(n)=5}. - R. J. Mathar, Nov 29 2015

Extensions

More terms from Ryan Propper, Apr 26 2006

a(56)-a(106) from Max Alekseyev, Aug 18 2013