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 A087374 #6 Dec 16 2013 14:11:06
%S A087374 1,4,9,25,121,729,5041,40401,363609,3629025,39917124,479040769,
%T A087374 6227103744,87178467600,1307674583296,20922793332736,355687454263684,
%U A087374 6402373820077225,121645100663836929,2432902009335560361
%N A087374 Smallest square >= n!.
%t A087374 ssn[n_]:=Module[{sr=Sqrt[n]},If[IntegerQ[sr],n,(Floor[sr]+1)^2]]; ssn/@ (Range[20]!) (* _Harvey P. Dale_, Dec 16 2013 *)
%K A087374 nonn
%O A087374 1,2
%A A087374 _Amarnath Murthy_, Sep 09 2003
%E A087374 More terms from _David Wasserman_, May 24 2005