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 A136770 #7 Dec 26 2023 13:34:38
%S A136770 12,19,32,39,52,59,66,79,86,99,106,119,120,133,140,153,160,173,180,
%T A136770 181,194,201,214,221,234,241,248,261,268,281,288,301,302,315,322,335,
%U A136770 342,355,362,363,376,383,396,403,416,423,430,443,450,463,470,483,484,497
%N A136770 n! never ends in this many 0's in base 9.
%t A136770 Module[{nn=5000,zd},zd=Union[Table[Length[Last[Split[IntegerDigits[n!,9]]]],{n,nn}]];Complement[ Range[Max[zd]],zd]] (* _Harvey P. Dale_, Dec 26 2023 *)
%Y A136770 Cf. A000142, A136760, A136696.
%Y A136770 Cf. A000966, A055938, A096346, A136767, A136768, A136769, A136771, A136772, A136773, A136774.
%K A136770 base,nonn
%O A136770 1,1
%A A136770 _Carl R. White_, Jan 21 2008