A114822 Indices of Fibonacci numbers with 13 prime factors when counted with multiplicity.

84, 132, 156, 162, 224, 234, 260, 354, 364, 368, 405, 434, 438, 455, 472, 512, 536, 584, 585, 595, 610, 615, 645, 693, 741, 775, 777, 822, 830, 834, 867, 904, 931, 957, 962, 1001, 1025, 1045, 1066, 1070, 1102, 1106, 1108, 1146, 1147, 1158, 1209, 1268, 1309, 1310, 1317, 1334, 1335, 1388

Offset: 1

Author

Shyam Sunder Gupta, Feb 19 2006

Keywords

• hard
• nonn

Examples

			a(1)=84 because the 84th Fibonacci number (i.e., 160500643816367088) consists of 13 prime factors (i.e., 2*2*2*2*3*3*13*29*83*211*281*421*1427).
		

Links

• Blair Kelly, Fibonacci and Lucas Factorizations.

Crossrefs

Column k=13 of A303215.

Programs

PARI

n=1;while(n<360,if(bigomega(fibonacci(n))==13,print1(n,", "));n++)

Extensions

More terms from Ryan Propper, May 24 2006

More terms from Amiram Eldar, Oct 14 2019