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 A004693 #18 Nov 12 2014 06:16:06
%S A004693 0,1,1,2,3,5,8,11,19
%N A004693 Fibonacci numbers written in base 12. (Next term contains a non-decimal character.)
%C A004693 Breaks most of my rules, but included to help people taking IQ tests.
%C A004693 The next term is 34-in-base-12 which is "2 10", and so cannot be shown here.
%C A004693 Fibonacci numbers expressed in base 12 end in the following two-digit combinations: {00, 01, 01, 02, 03, 05, 08, 11, 19, 2a, 47, 75}. Every twelfth term is divisible by 12^2. Note: here the digit "a" = decimal 10. - _Michael De Vlieger_, Nov 11 2014
%H A004693 Michael De Vlieger, <a href="/A004693/a004693.txt">Table of Fibonacci Numbers in Base 12</a> for n = 1..144 (duodecimal 100)
%t A004693 a004693[n_Integer] := BaseForm[Fibonacci[n], 12] (* _Michael De Vlieger_, Nov 11 2014 *)
%Y A004693 Cf. A000045.
%K A004693 nonn,base
%O A004693 0,4
%A A004693 _N. J. A. Sloane_