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 A111429 #8 Nov 07 2018 20:17:10 %S A111429 0,0,0,0,0,0,0,1,2,24,3136,53798080,8607945812375585, %T A111429 220376367601372354229355484029120, %U A111429 78531983922879942351416192215114163135375656803468317366190276600 %N A111429 Tribonacci(hexanacci(n)). %H A111429 Alois P. Heinz, <a href="/A111429/b111429.txt">Table of n, a(n) for n = 0..17</a> %F A111429 a(n) = A000073(A001592(n)). %p A111429 a:= n-> (<<0|1|0>, <0|0|1>, <1|1|1>>^((<<0|1|0|0|0|0>, <0|0|1|0|0|0>, %p A111429 <0|0|0|1|0|0>, <0|0|0|0|1|0>, <0|0|0|0|0|1>, <1|1|1|1|1|1>>^n)[1, 6]))[1, 3]: %p A111429 seq(a(n), n=0..14); # _Alois P. Heinz_, Nov 07 2018 %Y A111429 Cf. A000045, A000073, A001592, A007570. %K A111429 easy,nonn %O A111429 0,9 %A A111429 _Jonathan Vos Post_, Nov 13 2005