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 A068741 #15 Sep 08 2022 08:45:05 %S A068741 1,1,24,10888869450418352160768000000 %N A068741 a(n) = (n^n)!. %C A068741 Next term: 857817775342842654119...0 (507 digits). - _Vladimir Joseph Stephan Orlovsky_, Dec 03 2008 %F A068741 a(n) = A000142(A000312(n)). - _Michel Marcus_, Jan 12 2015 %e A068741 a(0) = (0^0)! = 1! = 1; %e A068741 a(1) = (1^1)! = 1! = 1; %e A068741 a(2) = (2^2)! = 4! = 24; %e A068741 a(3) = (3^3)! = 27! = 10888869450418352160768000000. %t A068741 a[n_]:=(n^n)!; (* _Vladimir Joseph Stephan Orlovsky_, Dec 03 2008 *) %o A068741 (Magma) [Factorial(n^n): n in [0..5]]; // _Vincenzo Librandi_, Jan 20 2015 %Y A068741 Cf. A000142, A000312, A068740, A068742. %K A068741 nonn %O A068741 0,3 %A A068741 _Henry Bottomley_, Feb 26 2002