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 A192680 #7 Apr 28 2025 16:12:14
%S A192680 1,1,1,2,7,20,65,232,883,3581,15383,69579,329769,1631137,8391824,
%T A192680 44777342,247182082,1408611456,8270902948,49953724226,309870713560,
%U A192680 1971523962002,12849924998486,85702472618249,584305721381119,4068533850711783,28907888594859403
%N A192680 Floor-Sqrt transform of Sylvester continuants (A002801).
%F A192680 a(n) = floor(sqrt(A002801(n))).
%t A192680 FSFromExpSeries[f_,x_,n_] := Map[Floor[Sqrt[#]]&,CoefficientList[Series[f,{x,0,n}],x]Table[k!,{k,0,n}]]
%t A192680 FSFromExpSeries[Exp[x/2]/(1-2x)^(1/4),x,40]
%K A192680 nonn
%O A192680 0,4
%A A192680 _Emanuele Munarini_, Jul 07 2011