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 A100993 #16 Mar 31 2021 02:35:38 %S A100993 2,3,4,8,14,18,24,38,44,48,54,68,74,84,98,104,108,114,128,138,158,164, %T A100993 168,174,194,198,224,228,234,258,264,278,284,294,308,314,318,324,338, %U A100993 348,354,368,374,378,384,398,434,444,458,464,468,488,504,524,548,558 %N A100993 Indices k of Fibonacci numbers F(k) (A000045) that are divisible by k-1. %C A100993 When k-1 is prime, it is in A003631; when k-1 is composite (such as 323), it is in A069107. - _T. D. Noe_, Dec 13 2004 %H A100993 Amiram Eldar, <a href="/A100993/b100993.txt">Table of n, a(n) for n = 1..10000</a> %H A100993 Ron Knott, <a href="http://www.maths.surrey.ac.uk/hosted-sites/R.Knott/Fibonacci/fibmaths.html">Mathematical Magic of the Fibonacci Numbers</a>. %F A100993 a(n) = A069104(n) + 1. - _T. D. Noe_, Dec 13 2004 %e A100993 14 is a term because F(14) = 377 = 13*29 is divisible by 13, one less than its index number 14. %t A100993 Select[Range[2, 500], Mod[ Fibonacci[ # ], # - 1] == 0 &] (* _Robert G. Wilson v_, Nov 26 2004 *) %Y A100993 Cf. A000045, A100992, A003631, A023162, A023173, A069104, A069107. %K A100993 nonn %O A100993 1,1 %A A100993 _Ron Knott_, Nov 25 2004