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 A055774 #46 Jul 02 2025 16:01:59
%S A055774 1,4,54,768,75000,233280,592950960,5284823040,1735643790720,
%T A055774 5670000000000,1035338990313196800,17163493362892800,
%U A055774 145077660657859734604800,9653278129532887449600
%N A055774 Least common multiple of n! and n^n.
%H A055774 Vincenzo Librandi, <a href="/A055774/b055774.txt">Table of n, a(n) for n = 1..200</a>
%F A055774 a(n) = lcm(A000312(n), A000142(n)) = A000312(n)*A000142(n)/A051696(n).
%p A055774 A055774:=n->lcm(n!,n^n): seq(A055774(n), n=1..15); # _Wesley Ivan Hurt_, Jul 07 2014
%t A055774 Table[LCM[n!, n^n], {n, 15}] (* _Wesley Ivan Hurt_, Jul 07 2014 *)
%o A055774 (GAP) List([1..200], n->Lcm(Factorial(n),n^n)); # _Muniru A Asiru_, Feb 04 2018
%o A055774 (PARI) a(n) = lcm(n!, n^n); \\ _Michel Marcus_, Feb 06 2018
%Y A055774 Cf. A000142 (n!), A000312 (n^n), A051696 (gcd).
%K A055774 nonn
%O A055774 1,2
%A A055774 _Henry Bottomley_, Jul 12 2000
%E A055774 More terms from _James Sellers_, Jul 13 2000