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 A074542 #18 Sep 08 2022 08:45:07
%S A074542 3,16,104,736,5408,40576,308864,2377216,18457088,144295936,1134209024,
%T A074542 8952733696,70896263168,562816516096,4476410691584,35654557106176,
%U A074542 284296086683648,2268726473261056,18115958466412544,144724547816390656
%N A074542 a(n) = 2^n + 6^n + 8^n.
%H A074542 Vincenzo Librandi, <a href="/A074542/b074542.txt">Table of n, a(n) for n = 0..200</a>
%H A074542 <a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (16,-76,96).
%F A074542 From _Mohammad K. Azarian_, Dec 27 2008: (Start)
%F A074542 G.f.: 1/(1-2*x) + 1/(1-6*x) + 1/(1-8*x).
%F A074542 E.g.f.: exp(2*x) + exp(6*x) + exp(8*x). (End)
%F A074542 a(n) = 16*a(n-1) - 76*a(n-2) + 96*a(n-3). - _Wesley Ivan Hurt_, Jun 26 2022
%t A074542 Table[2^n + 6^n + 8^n, {n, 0, 20}]
%o A074542 (Magma) [2^n + 6^n + 8^n: n in [0..20]]; // _Vincenzo Librandi_, Jun 11 2011
%Y A074542 Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
%K A074542 easy,nonn
%O A074542 0,1
%A A074542 _Robert G. Wilson v_, Aug 23 2002