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 A155957 #13 Sep 08 2022 08:45:41
%S A155957 1,2,64,5832,1048576,312500000,139314069504,86812553324672,
%T A155957 72057594037927936,76848453272063549952,102400000000000000000000,
%U A155957 166712830744247830760081408,325619086145088897570576531456
%N A155957 a(n) = (2*n^2)^n.
%C A155957 Central terms of the triangle in A155955;
%H A155957 G. C. Greubel, <a href="/A155957/b155957.txt">Table of n, a(n) for n = 0..200</a>
%F A155957 a(n) = A062206(n)*A000079(n).
%F A155957 a(n) = n! * [x^n] 1/(1 + LambertW(-2*n*x)). - _Ilya Gutkovskiy_, Oct 03 2017
%t A155957 Table[If[n==0,1,(2*n^2)^n], {n, 0, 30}] (* _G. C. Greubel_, Sep 14 2018 *)
%o A155957 (PARI) vector(30, n, n--; (2*n^2)^n) \\ _G. C. Greubel_, Sep 14 2018
%o A155957 (Magma) [(2*n^2)^n: n in [0..30]]; // _G. C. Greubel_, Sep 14 2018
%Y A155957 Cf. A000079, A062206, A155955.
%K A155957 nonn
%O A155957 0,2
%A A155957 _Reinhard Zumkeller_, Jan 31 2009