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 A017220 #15 Sep 08 2022 08:44:42 %S A017220 16777216,23298085122481,12855002631049216,787662783788549761, %T A017220 16777216000000000000,191581231380566414401,1449225352009601191936, %U A017220 8182718904632857144561,37133262473195501387776,142241757136172119140625 %N A017220 a(n) = (9*n + 4)^12. %H A017220 Vincenzo Librandi, <a href="/A017220/b017220.txt">Table of n, a(n) for n = 0..10000</a> %H A017220 <a href="/index/Rec#order_13">Index entries for linear recurrences with constant coefficients</a>, signature (13, -78, 286, -715, 1287, -1716, 1716, -1287, 715, -286, 78, -13, 1). %o A017220 (Magma) [(9*n+4)^12: n in [0..15]]; // _Vincenzo Librandi_, Jul 24 2011 %Y A017220 Cf. A008456 (n^12), A017209 (9*n+4). %K A017220 nonn,easy %O A017220 0,1 %A A017220 _N. J. A. Sloane_