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 A128441 #4 Apr 09 2018 18:05:37
%S A128441 1,4,8,16,28,48,79,128,203,320,497,768,1176,1792,2715,4096,6154,9216,
%T A128441 13757,20480,30411,45056,66615,98304,144815,212992,312801,458752,
%U A128441 671943,983040,1436569,2097152,3058502,4456448,6487733,9437184,13716921
%N A128441 a(n)=Floor(n*2^(n/2)).
%C A128441 a(n)=T(n,n), where T is given by A128440.
%t A128441 Table[Floor[n 2^(n/2)],{n,40}] (* _Harvey P. Dale_, Apr 09 2018 *)
%Y A128441 Cf. A128440.
%K A128441 nonn
%O A128441 1,2
%A A128441 _Clark Kimberling_, Mar 03 2007