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 A074511 #19 Oct 14 2022 09:49:21
%S A074511 3,10,42,190,882,4150,19722,94510,456162,2215270,10814202,53022430,
%T A074511 260917842,1287811990,6371951082,31591319950,156882857922,
%U A074511 780119322310,3883416742362,19348364235070,96466943268402,481235204714230,2401777977060042,11991297699255790
%N A074511 a(n) = 1^n + 4^n + 5^n.
%H A074511 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (10,-29,20).
%F A074511 From _Mohammad K. Azarian_, Dec 26 2008: (Start)
%F A074511 G.f.: 1/(1-x) + 1/(1-4*x) + 1/(1-5*x).
%F A074511 E.g.f.: e^x + e^(4*x) + e^(5*x). (End)
%F A074511 a(n) = 9*a(n-1) - 20*a(n-2) + 12 with a(0)=3, a(1)=10. - _Vincenzo Librandi_, Jul 21 2010
%t A074511 Table[1^n + 4^n + 5^n, {n, 0, 21}]
%Y A074511 Cf. A001550, A001576, A034513, A001579, A074501..A074580.
%K A074511 easy,nonn
%O A074511 0,1
%A A074511 _Robert G. Wilson v_, Aug 23 2002