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 A067039 #10 Jul 04 2019 10:27:35
%S A067039 1,2,9,4096,59604644775390625
%N A067039 The tower function n^{(n-1)!}.
%C A067039 a(n) = n^(n-1)^(n-2)^...^3^2^1 with all power operators nested from the left. Nesting from the right gives A049384. - _Gus Wiseman_, Jul 03 2019
%e A067039 a(4) = 4^(3!) = 4^6 = 4096.
%o A067039 (Maxima) makelist((n+1)^(n!),n,0,6); /* _Martin Ettl_, Jan 17 2013 */
%Y A067039 Cf. A000142, A007489, A049384, A052409, A052410, A140319, A294338, A316782, A325624.
%K A067039 nonn
%O A067039 1,2
%A A067039 _Amarnath Murthy_, Dec 29 2001