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 A339346 #6 Dec 01 2020 13:54:34 %S A339346 1,4,24,168,1257,9778,77994,633056,5204434 %N A339346 a(n) is the number of domino towers of height n consisting of 2*n bricks, a(n) = A333650(2*n, n). %Y A339346 Cf. A333650. %K A339346 nonn,more %O A339346 1,2 %A A339346 _Peter Luschny_, Dec 01 2020