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 A016958 #27 Sep 08 2022 08:44:41
%S A016958 16,100,256,484,784,1156,1600,2116,2704,3364,4096,4900,5776,6724,7744,
%T A016958 8836,10000,11236,12544,13924,15376,16900,18496,20164,21904,23716,
%U A016958 25600,27556,29584,31684,33856
%N A016958 a(n) = (6n + 4)^2.
%H A016958 Vincenzo Librandi, <a href="/A016958/b016958.txt">Table of n, a(n) for n = 0..3000</a>
%H A016958 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (3,-3,1).
%F A016958 a(n) = (A016957(n))^2. - _Zerinvary Lajos_, Jun 30 2009
%F A016958 Sum_{n>=0} 1/a(n) = A086730. - _Amiram Eldar_, Nov 17 2020
%t A016958 Table[(6*n + 4)^2, {n, 0, 30}] (* _Amiram Eldar_, Nov 17 2020 *)
%o A016958 (Magma) [(6*n+4)^2: n in [0..50]]; // _Vincenzo Librandi_, May 06 2011
%o A016958 (PARI) a(n)=(6*n+4)^2 \\ _Charles R Greathouse IV_, Jun 17 2017
%Y A016958 Cf. A016957, A086730.
%K A016958 nonn,easy
%O A016958 0,1
%A A016958 _N. J. A. Sloane_
%E A016958 Notation in formula cleaned up by _R. J. Mathar_, Aug 05 2010