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 A197977 #10 Jun 02 2025 05:17:40
%S A197977 5,72,1876,69729,3363232,199205127,13982257729,1134344816184,
%T A197977 104416147080711,10750872867074586,1224163955433850944,
%U A197977 152733676280699540998,20719969553916698313304,3036565789908881887393114
%N A197977 Round((4*n+1/n)^n).
%H A197977 Vincenzo Librandi, <a href="/A197977/b197977.txt">Table of n, a(n) for n = 1..300</a>
%t A197977 Table[Round[(4n+1/n)^n],{n,20}] (* _Harvey P. Dale_, Aug 20 2013 *)
%o A197977 (Magma) [Round((4*n+1/n)^n): n in [1..20]]
%Y A197977 Cf. A014056, A197324
%K A197977 nonn
%O A197977 1,1
%A A197977 _Vincenzo Librandi_, Oct 20 2011