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 A205448 #5 Mar 30 2012 18:58:11 %S A205448 2,7,5,20,18,13,54,52,47,34,143,141,136,123,89,376,374,369,356,322, %T A205448 233,986,984,979,966,932,843,610,2583,2581,2576,2563,2529,2440,2207, %U A205448 1597,6764,6762,6757,6744,6710,6621,6388,5778,4181,17710,17708 %N A205448 Ordered differences of even-indexed Fibonacci numbers. %C A205448 For a guide to related sequences, see A204892. %e A205448 a(1)=s(2)-s(1)=3-1=2 %e A205448 a(2)=s(3)-s(1)=8-1=7 %e A205448 a(3)=s(3)-s(2)=8-3=5 %e A205448 a(4)=s(4)-s(1)=21-1=20 %e A205448 a(5)=s(4)-s(2)=21-3=18 %t A205448 (See the program at A205450.) %Y A205448 Cf. A205450, A204892. %K A205448 nonn %O A205448 1,1 %A A205448 _Clark Kimberling_, Jan 27 2012