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 A320991 #4 Oct 25 2018 20:51:54 %S A320991 0,1,9,82,6651,4848661,286308590040,12324645995360107501, %T A320991 31327596501857712343958159785869, %U A320991 3427833941153173630835645403655873661712817810325122,953377933333360661538750693295319059526691048970554893790972688729398538561592385711 %N A320991 Fibonacci rabbit sequence number n coded in base nine. %H A320991 Alois P. Heinz, <a href="/A320991/b320991.txt">Table of n, a(n) for n = 0..15</a> %p A320991 b:= proc(n) option remember; `if`(n<2, [n$2], [b(n-1)[1]* %p A320991 9^b(n-1)[2]+b(n-2)[1], b(n-1)[2]+b(n-2)[2]]) %p A320991 end: %p A320991 a:= n-> b(n)[1]: %p A320991 seq(a(n), n=0..11); %Y A320991 Column k=9 of A144287. %K A320991 nonn %O A320991 0,3 %A A320991 _Alois P. Heinz_, Oct 25 2018