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 A302487 #11 May 30 2025 01:10:33 %S A302487 2,2,3,4,7,16,43,124,367,1096,3283,9844,29527,88576,265723,797164, %T A302487 2391487,7174456,21523363,64570084,193710247,581130736,1743392203, %U A302487 5230176604,15690529807,47071589416,141214768243,423644304724,1270932914167,3812798742496 %N A302487 Total domination number of the n-Apollonian network. %H A302487 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ApollonianNetwork.html">Apollonian Network</a>. %H A302487 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TotalDominationNumber.html">Total Domination Number</a>. %H A302487 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (4,-3). %F A302487 a(n) = (3^(n-3) + 5) / 2 = A291773(n) for n >= 3. - _Andrew Howroyd_, May 29 2025 %Y A302487 Cf. A291773, A347479. %K A302487 nonn,easy %O A302487 1,1 %A A302487 _Eric W. Weisstein_, Apr 08 2018 %E A302487 a(8)-a(9) corrected and a(10) onwards from _Andrew Howroyd_, May 29 2025