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 A192663 #9 Jan 13 2025 16:28:25
%S A192663 1,1,3,9,22,54,136,340,857,2164,5481,13911,35379,90124,229913,587254,
%T A192663 1501615,3843314,9845118,25238541,64744455,166190960,426829202,
%U A192663 1096784835,2819620836,7251796132,18658280277,48023738374,123648031266,318460151301,820446813941
%N A192663 Floor-Sqrt transform of the binomial coefficients binomial(3*n,n) (A005809).
%F A192663 a(n) = floor(sqrt(binomial(3*n,n))).
%t A192663 Table[Floor[Sqrt[Binomial[3n,n]]],{n,0,100}]
%o A192663 (Maxima) makelist(floor(sqrt(binomial(3*n,n))),n,0,24);
%Y A192663 Cf. A005809.
%K A192663 nonn
%O A192663 0,3
%A A192663 _Emanuele Munarini_, Jul 07 2011