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 A024020 #14 Sep 08 2022 08:44:48 %S A024020 1,1,-1020,-59041,-1048560,-9765593,-60466112,-282475121,-1073741568, %T A024020 -3486783889,-9999998976,-25937422553,-61917360128,-137858483657, %U A024020 -289254638592,-576650357857,-1099511562240,-2015993769377 %N A024020 a(n) = 2^n - n^10. %H A024020 Vincenzo Librandi, <a href="/A024020/b024020.txt">Table of n, a(n) for n = 0..235</a> %F A024020 From _Chai Wah Wu_, Jan 26 2020: (Start) %F A024020 a(n) = 13*a(n-1) - 77*a(n-2) + 275*a(n-3) - 660*a(n-4) + 1122*a(n-5) - 1386*a(n-6) + 1254*a(n-7) - 825*a(n-8) + 385*a(n-9) - 121*a(n-10) + 23*a(n-11) - 2*a(n-12) for n > 11. %F A024020 G.f.: (x^11 + 2036*x^10 + 94612*x^9 + 862709*x^8 + 2165186*x^7 + 1310816*x^6 - 400432*x^5 - 359182*x^4 - 45979*x^3 - 956*x^2 - 12*x + 1)/((x - 1)^11*(2*x - 1)). (End) %o A024020 (Magma) [2^n-n^10: n in [0..30] ]; // _Vincenzo Librandi_, Apr 30 2011 %K A024020 sign %O A024020 0,3 %A A024020 _N. J. A. Sloane_