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 A017450 #21 Sep 08 2022 08:44:42
%S A017450 25,256,729,1444,2401,3600,5041,6724,8649,10816,13225,15876,18769,
%T A017450 21904,25281,28900,32761,36864,41209,45796,50625,55696,61009,66564,
%U A017450 72361,78400,84681,91204,97969,104976,112225,119716,127449,135424,143641,152100,160801,169744,178929,188356,198025
%N A017450 a(n) = (11*n + 5)^2.
%H A017450 Vincenzo Librandi, <a href="/A017450/b017450.txt">Table of n, a(n) for n = 0..10000</a>
%H A017450 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (3,-3,1).
%F A017450 a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3); a(0)=25, a(1)=256, a(2)=729. - _Harvey P. Dale_, Dec 08 2013
%F A017450 From _G. C. Greubel_, Sep 18 2019: (Start)
%F A017450 G.f.: (25 +181*x +36*x^2)/(1-x)^3.
%F A017450 E.g.f.: (25 +231*x +121*x^2)*exp(x). (End)
%p A017450 seq((11*n+5)^2, n=0..45); # _G. C. Greubel_, Sep 18 2019
%t A017450 (11Range[0,45]+5)^2 (* or *) LinearRecurrence[{3,-3,1},{25,256,729},45] (* _Harvey P. Dale_, Dec 08 2013 *)
%o A017450 (Magma)[(11*n+5)^2: n in [0..45]]; // _Vincenzo Librandi_, Sep 03 2011
%o A017450 (PARI) a(n)=(11*n+5)^2 \\ _Charles R Greathouse IV_, Jun 17 2017
%o A017450 (Sage) [(11*n+5)^2 for n in (0..45)] # _G. C. Greubel_, Sep 18 2019
%o A017450 (GAP) List([0..45], n-> (11*n+5)^2); # _G. C. Greubel_, Sep 18 2019
%Y A017450 Powers of the form (11*n+5)^m: A017449 (m=1), this sequence (m=2), A017451 (m=3), A017452 (m=4), A017453 (m=5), A017454 (m=6), A017455 (m=7), A017456 (m=8), A017457 (m=9), A017458 (m=10), A017459 (m=11), A017460 (m=12).
%K A017450 nonn,easy
%O A017450 0,1
%A A017450 _N. J. A. Sloane_