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 A066979 #16 Dec 09 2024 23:23:36
%S A066979 0,0,0,1,3,11,39,157,708,3543,19490,116943,760134,5320940,39907054,
%T A066979 319256437,2713679718,24423117468,232019615953,2320196159531,
%U A066979 24362059675078,267982656425859,3081800548897382,36981606586768593
%N A066979 a(n) = floor(n!/2^n).
%H A066979 Harry J. Smith, <a href="/A066979/b066979.txt">Table of n, a(n) for n = 1..150</a>
%t A066979 Table[Floor[n!/2^n],{n,30}] (* _Harvey P. Dale_, Aug 21 2021 *)
%o A066979 (PARI) a(n) = { n!\2^n } \\ _Harry J. Smith_, Apr 14 2010
%K A066979 nonn
%O A066979 1,5
%A A066979 _Benoit Cloitre_, Jan 26 2002