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 A125896 #8 Mar 15 2014 11:54:57
%S A125896 1,1,3,6,11,20,36,66,121,222,405,738,1346,2453,4472,8153,14863,27093,
%T A125896 49388,90029,164112,299156,545324,994058,1812045,3303133,6021201,
%U A125896 10975901,20007704,36471557,66483113,121190448,220915119,402700792
%N A125896 Floor(((1+sqrt(7))/2)^n).
%t A125896 Table[Floor[((1 + Sqrt[7])/2)^n], {n, 0, 100}]
%Y A125896 Cf. A125890-A125899.
%K A125896 nonn
%O A125896 0,3
%A A125896 _Artur Jasinski_, Dec 13 2006
%E A125896 Added a(0)=1 - _Jon Perry_, Mar 15 2014