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 A028367 #19 Sep 08 2022 08:44:50
%S A028367 1,2,720,87178291200,265252859812191058636308480000000,
%T A028367 31469973260387937525653122354950764088012280797258232192163168247821107200000000000000
%N A028367 a(n) = (2^n-2)!.
%H A028367 I. Strazdins, <a href="https://doi.org/10.1023/A:1005769927571">Universal affine classification of Boolean functions</a>, Acta Applic. Math. 46 (1997), 147-167.
%t A028367 Table[(2^n - 2)!, {n, 7}] (* _Vincenzo Librandi_, Jan 05 2020 *)
%o A028367 (PARI) a(n) = (2^n-2)!; \\ _Michel Marcus_, Jan 04 2020
%o A028367 (Magma) [Factorial(2^n-2): n in [1..7]]; // _Vincenzo Librandi_, Jan 05 2020
%Y A028367 Cf. A028366.
%K A028367 nonn
%O A028367 1,2
%A A028367 _N. J. A. Sloane_
%E A028367 Offset corrected by _Sean A. Irvine_, Jan 03 2020