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 A038744 #15 May 11 2020 05:42:36 %S A038744 1,5,30,188,1201,7756,50439,329625,2161974,14220038,93740152, %T A038744 619083041,4094863900,27120465023,179822255181 %N A038744 T(2n,n), array T as in A038738. %F A038744 G.f.: (g-1)/((3*g-1)*(g^2-3*g+1)) where g*(1-g)^2 = x. - _Mark van Hoeij_, Nov 10 2011 %K A038744 nonn,more %O A038744 0,2 %A A038744 _Clark Kimberling_, May 02 2000