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 A017294 #34 Jul 08 2025 06:03:48 %S A017294 4,144,484,1024,1764,2704,3844,5184,6724,8464,10404,12544,14884,17424, %T A017294 20164,23104,26244,29584,33124,36864,40804,44944,49284,53824,58564, %U A017294 63504,68644,73984,79524,85264 %N A017294 a(n) = (10*n+2)^2. %H A017294 Vincenzo Librandi, <a href="/A017294/b017294.txt">Table of n, a(n) for n = 0..10000</a> %H A017294 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (3,-3,1). %F A017294 a(n) = a(n-1)+200n-60, n>0 ; a(0)=4. - _Miquel Cerda_, Oct 30 2016 %F A017294 G.f.: 4*(1 + 33*x + 16*x^2)/(1 - x)^3. - _Ilya Gutkovskiy_, Oct 30 2016 %F A017294 a(n) = A017293(n)^2. - _Michel Marcus_, Oct 30 2016 %F A017294 a(n) = (2*A016861(n))^2. - _David A. Corneth_, Oct 30 2016 %t A017294 (10 Range[0, 50] + 2)^2 (* _Wesley Ivan Hurt_, Sep 04 2022 *) %o A017294 (Magma) [(10*n+2)^2: n in [0..35]]; // _Vincenzo Librandi_, Jul 30 2011 %o A017294 (PARI) a(n)=(10*n+2)^2 \\ _Charles R Greathouse IV_, Jun 17 2017 %Y A017294 Cf. A016861, A017293. %K A017294 nonn,easy %O A017294 0,1 %A A017294 _N. J. A. Sloane_