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 A022282 #23 Sep 08 2022 08:44:46
%S A022282 0,12,49,111,198,310,447,609,796,1008,1245,1507,1794,2106,2443,2805,
%T A022282 3192,3604,4041,4503,4990,5502,6039,6601,7188,7800,8437,9099,9786,
%U A022282 10498,11235,11997,12784,13596,14433
%N A022282 a(n) = n*(25*n - 1)/2.
%H A022282 G. C. Greubel, <a href="/A022282/b022282.txt">Table of n, a(n) for n = 0..5000</a>
%H A022282 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (3,-3,1).
%F A022282 a(n) = 25*n + a(n-1) - 13 for n>0, a(0)=0. - _Vincenzo Librandi_, Aug 04 2010
%F A022282 G.f.: x*(12 + 13*x)/(1 - x)^3 . - _R. J. Mathar_, Aug 04 2016
%F A022282 a(n) = A000217(13*n-1) - A000217(12*n-1). - _Bruno Berselli_, Oct 14 2016
%F A022282 E.g.f.: (x/2)*(25*x + 24)*exp(x). - _G. C. Greubel_, Aug 23 2017
%F A022282 a(n) = 3*a(n-1)-3*a(n-2)+a(n-3). - _Wesley Ivan Hurt_, Apr 23 2021
%t A022282 Table[n (25 n - 1)/2, {n, 0, 40}] (* _Bruno Berselli_, Oct 14 2016 *)
%o A022282 (PARI) a(n)=n*(25*n-1)/2 \\ _Charles R Greathouse IV_, Jun 16 2017
%o A022282 (Magma) [n*(25*n - 1)/2 : n in [0..50]]; // _Wesley Ivan Hurt_, Apr 23 2021
%Y A022282 Cf. A022283.
%Y A022282 Cf. similar sequences listed in A022288.
%K A022282 nonn,easy
%O A022282 0,2
%A A022282 _N. J. A. Sloane_