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 A119022 #3 Mar 30 2012 18:36:57 %S A119022 1,1,4,20,154,1302,12672,129558,1462890,17537234,223689128,2959757528, %T A119022 40637432332,573938538500,8324542177200,123276663007740, %U A119022 1861540558106490,28613268804680010,447616821726181800 %N A119022 Inverse binomial transform of A119020, even-indexed terms only, since all odd-indexed terms are equal to zero. %C A119022 A119020 is the eigenvector of triangle A055151 of Motzkin polynomial coefficients. %F A119022 a(n) = A119020(n)*C(2n,n)/(n+1) = A119020(n)*A000108(n). %Y A119022 Cf. A119020, A119021, A000108 (Catalan). %K A119022 nonn %O A119022 0,3 %A A119022 _Paul D. Hanna_, May 09 2006