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

1,1

Links

Table of n, a(n) for n=1..54.

Blair Kelly, Fibonacci and Lucas Factorizations.

Example

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).

Prog

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

Crossrefs

Column k=13 of A303215.

Sequence in context: A227734 A192322 A015708 * A099637 A274348 A143758

Adjacent sequences: A114819 A114820 A114821 * A114823 A114824 A114825

Keyword

hard,nonn

Author

Shyam Sunder Gupta, Feb 19 2006

Extensions

More terms from Ryan Propper, May 24 2006

More terms from Amiram Eldar, Oct 14 2019

Status

approved