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 A261626 #53 Sep 14 2015 12:46:18 %S A261626 0,0,0,6,46362,5358359254990966640871720 %N A261626 a(n) = Fibonacci(n!) - Fibonacci(n)!. %F A261626 a(n) = A063374(n) - A060001(n). %F A261626 log log a(n) ~ n log n. - _Charles R Greathouse IV_, Sep 14 2015 %e A261626 For n = 1, a(n) = Fibonacci(n!) - Fibonacci(n)! = 1 - 1 = 0. %o A261626 (PARI) a(n) = fibonacci(n!) - fibonacci(n)!; %o A261626 vector(6, n, a(n-1)) %Y A261626 Cf. A000045, A060001, A063374. %K A261626 nonn %O A261626 0,4 %A A261626 _Altug Alkan_, Sep 14 2015