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 A136761 #16 Jan 15 2021 16:32:38
%S A136761 1,1,2,6,2,10,5,3,2,2,2,2,2,2,3,4,6,10,1,2,4,9,1,3,7,1,3,9,2,5,1,3,1,
%T A136761 3,9,2,9,2,9,3,1,3,1,5,1,7,2,1,4,1,9,3,1,7,3,1,8,3,1,9,4,2,1,7,3,2,1,
%U A136761 6,3,2,1,8,4,2,1,1,7,4,3,2,1,10,6,4,3,2,1,1,9,6,5,3,2,2,1,1,1,9,7,6
%N A136761 a(n) = leading digit of n! in base 11.
%H A136761 David A. Corneth, <a href="/A136761/b136761.txt">Table of n, a(n) for n = 0..9999</a>
%e A136761 a(10) = 2 as 10! = 20594010_11 which has leading digit 2. - _David A. Corneth_, Jan 15 2021
%t A136761 f[n_]:=First[IntegerDigits[n!,11]]; lst={};Do[AppendTo[lst,f[n]],{n,0,2*5!}];lst (* _Vladimir Joseph Stephan Orlovsky_, Jun 14 2009 *)
%t A136761 First[IntegerDigits[#,11]]&/@(Range[0,100]!) (* _Harvey P. Dale_, Feb 20 2013 *)
%o A136761 (PARI) a(n) = digits(n!, 11)[1]; \\ _Michel Marcus_, Jan 27 2015
%Y A136761 Cf. A000142, A136697, A136754, A136755, A136756, A136757, A136758, A136759, A136760, A008905, A136762, A136763, A136764, A136765, A136766.
%K A136761 nonn,easy,base
%O A136761 0,3
%A A136761 _Carl R. White_, Jan 21 2008