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 A260614 #37 Sep 08 2022 08:46:13
%S A260614 1,1,4,186624,248907105618907424441185380787996852224
%N A260614 Product of the first n ultrafactorials ((n!)^(n!)).
%C A260614 a(6) is about 10^2345.
%C A260614 This could be called a superultrafactorial by analogy with factorial and superfactorial.
%H A260614 Matthew Campbell, <a href="/A260614/b260614.txt">Table of n, a(n) for n = 0..5</a>
%H A260614 <a href="/index/Di#divseq">Index to divisibility sequences</a>
%F A260614 a(n) = Product_{k=1..n} A046882(k).
%e A260614 a(3) = (1!)^(1!) * (2!)^(2!) * (3!)^(3!) = 1^1 * 2^2 * 6^6 = 1 * 4 * 46656 = 186624.
%t A260614 Table[Product[(m!)^(m!), {m, 0, n}], {n, 0, 5}]
%o A260614 (PARI) a(n)=prod(k=2,n,k!^k!) \\ _Charles R Greathouse IV_, Aug 14 2015
%o A260614 (Magma) [Factorial(n)^Factorial(n): n in [0..5]]; // _Vincenzo Librandi_, Aug 29 2015
%Y A260614 Cf. A000178, A046882.
%K A260614 nonn,easy
%O A260614 0,3
%A A260614 _Matthew Campbell_, Aug 13 2015