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 A017126 #24 Oct 28 2023 11:32:34 %S A017126 25,169,441,841,1369,2025,2809,3721,4761,5929,7225,8649,10201,11881, %T A017126 13689,15625,17689,19881,22201,24649,27225,29929,32761,35721,38809, %U A017126 42025,45369,48841,52441,56169,60025,64009,68121,72361,76729,81225,85849,90601,95481,100489,105625 %N A017126 a(n) = (8*n + 5)^2. %H A017126 Vincenzo Librandi, <a href="/A017126/b017126.txt">Table of n, a(n) for n = 0..10000</a> %H A017126 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (3,-3,1). %F A017126 G.f.: ( -25 - 94*x - 9*x^2 ) / (x-1)^3. - _R. J. Mathar_, May 08 2015 %F A017126 E.g.f.: exp(x)*(25 + 144*x + 64*x^2). - _Stefano Spezia_, Oct 28 2023 %t A017126 (8Range[0,40]+5)^2 (* _Harvey P. Dale_, Mar 12 2011 *) %o A017126 (Magma) [(8*n+5)^2: n in [0..35] ]; // _Vincenzo Librandi_, Jul 21 2011 %o A017126 (PARI) a(n)=(8*n+5)^2 \\ _Charles R Greathouse IV_, Jun 17 2017 %Y A017126 Cf. A004770. %K A017126 nonn,easy %O A017126 0,1 %A A017126 _N. J. A. Sloane_