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 A205389 #7 Dec 25 2023 18:17:46 %S A205389 1,1,1,3,10,126,3,3,1,126,462,126,35,126,126,3,1,10,462,35,126,462,10, %T A205389 126,10,1716,3,126,10,126,92378,3,462,1,1,10,1,462,1716,35,3,126, %U A205389 20058300,462,10,10,126,126,1,35 %N A205389 s(A205387), where s(j)=(1/2)C(2j,j). %C A205389 For a guide to related sequences, see A204892. %t A205389 (See the program at A205386.) %Y A205389 Cf. A205386, A204892. %K A205389 nonn %O A205389 1,4 %A A205389 _Clark Kimberling_, Jan 27 2012