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 A016924 #18 Mar 28 2022 07:41:05
%S A016924 1,2401,28561,130321,390625,923521,1874161,3418801,5764801,9150625,
%T A016924 13845841,20151121,28398241,38950081,52200625,68574961,88529281,
%U A016924 112550881,141158161,174900625,214358881,260144641,312900721,373301041,442050625,519885601,607573201,705911761
%N A016924 a(n) = (6*n + 1)^4.
%H A016924 Vincenzo Librandi, <a href="/A016924/b016924.txt">Table of n, a(n) for n = 0..2000</a>
%H A016924 <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (5,-10,10,-5,1).
%F A016924 From _Amiram Eldar_, Mar 28 2022: (Start)
%F A016924 a(n) = A016921(n)^4 = A016922(n)^2.
%F A016924 Sum_{n>=0} 1/a(n) = PolyGamma(3, 1/6)/7776. (End)
%t A016924 (6Range[0,30]+1)^4 (* _Harvey P. Dale_, May 18 2011 *)
%o A016924 (Magma) [(6*n+1)^4: n in [0..50]]; // _Vincenzo Librandi_, May 04 2011
%Y A016924 Cf. A016921, A016922, A016923, A016925, A016926.
%K A016924 nonn,easy
%O A016924 0,2
%A A016924 _N. J. A. Sloane_