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 A259647 #5 Jul 02 2015 13:56:40
%S A259647 1,2,16,294,10424,635130,60535212,8378845734,1591416365520,
%T A259647 397329777218034,126160335768212820,49635257475383554590,
%U A259647 23694522124288261524984,13490127107426613875639850,9029074877857980800375629500,7018229497764789751949369835030
%N A259647 Expansion of exp(x*arcsin(x)) (even powers only).
%F A259647 a(n) ~ (2*n)! * exp(Pi/2) / (2*sqrt(Pi)*n^(3/2)).
%t A259647 nmax=20; Table[(CoefficientList[Series[E^(x*ArcSin[x]), {x, 0, 2*nmax}], x] * Range[0, 2*nmax]!)[[2*n+1]], {n,0,nmax}]
%Y A259647 Cf. A006228, A191301.
%K A259647 nonn
%O A259647 0,2
%A A259647 _Vaclav Kotesovec_, Jul 02 2015