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 A085531 #11 Sep 08 2022 08:45:11
%S A085531 1,3,125,16807,4782969,2357947691,1792160394037,1946195068359375,
%T A085531 2862423051509815793,5480386857784802185939,
%U A085531 13248496640331026125580781,39471584120695485887249589623,142108547152020037174224853515625,608266787713357709119683992618861307
%N A085531 a(n) = (2*n+1)^(2*n-1).
%H A085531 Vincenzo Librandi, <a href="/A085531/b085531.txt">Table of n, a(n) for n = 0..195</a>
%t A085531 Table[(2n+1)^(2n-1),{n,0,20}] (* _Harvey P. Dale_, Oct 08 2017 *)
%t A085531 Join[{1}, Array[(2 # + 1)^(2 # - 1)&, 15]] (* _Vincenzo Librandi_, Oct 09 2017 *)
%t A085531 Range[0,20]//(2#+1)^(2#-1)& (* _Waldemar Puszkarz_, Oct 09 2017 *)
%o A085531 (Magma) [(2*n+1)^(2*n-1): n in [0..15]]; // _Vincenzo Librandi_, Oct 09 2017
%K A085531 nonn
%O A085531 0,2
%A A085531 _N. J. A. Sloane_, Jul 05 2003