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 A246846 #12 Sep 08 2022 08:46:09
%S A246846 0,0,1,2,2,4,0,2,0,21,46,76,96,2,115,369,330,1804,481,330,8632,6184,
%T A246846 18226,35100,42702,17098,108120,249950,342721,433224,1118854,760977,
%U A246846 2881920,566378,4113707,2229460,2634351,19518945,48149442,41302415,97296382,35211640
%N A246846 a(n) = Catalan(n) mod Fibonacci(n).
%H A246846 Vincenzo Librandi, <a href="/A246846/b246846.txt">Table of n, a(n) for n = 1..1000</a>
%t A246846 Table[Mod[CatalanNumber[n], Fibonacci[n]], {n, 50}]
%o A246846 (Magma) [Catalan(n) mod Fibonacci(n): n in [1..50]];
%Y A246846 Cf. A000045, A000108.
%K A246846 nonn,less
%O A246846 1,4
%A A246846 _Vincenzo Librandi_, Sep 05 2014