This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A114843 #17 May 05 2024 19:21:53 %S A114843 20,24,27,28,32,52,55,74,77,85,87,91,93,97,115,123,143,146,149,157, %T A114843 161,163,178,187,197,209,211,214,215,221,223,239,242,249,262,269,283, %U A114843 287,307,311,313,321,334,349,379,391,393,409,421,453,487,493,499,523,581,586,617,641,647,677,691,707,709,787,794,811,823,839,853,859,887,907,913,929,941,953,1031,1049,1063,1093,1229 %N A114843 Indices of Fibonacci numbers with 4 distinct prime factors. %H A114843 Amiram Eldar, <a href="/A114843/b114843.txt">Table of n, a(n) for n = 1..88</a> %H A114843 Blair Kelly, <a href="http://mersennus.net/fibonacci/">Fibonacci and Lucas Factorizations</a>. %e A114843 a(1)=20 because the 20th Fibonacci number consists of 4 distinct prime factors (i.e., 6765 = 3 x 5 x 11 x 41). %o A114843 (PARI) n=1;while(n<350,if(omega(fibonacci(n))==4,print1(n,", "));n++) %Y A114843 Cf. A114823-A114826, A114836-A114841. %Y A114843 Column k=4 of A303217. %K A114843 nonn %O A114843 1,1 %A A114843 _Shyam Sunder Gupta_, Feb 19 2006 %E A114843 More terms from _Ryan Propper_, Apr 26 2006 %E A114843 a(56)-a(81) from _Max Alekseyev_, Aug 18 2013