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 A146528 #9 Jun 11 2024 07:51:12
%S A146528 4,6,8,12,20,36,68,132,260,516,1028,2052,4100,8196,16388,32772,65540,
%T A146528 131076,262148,524292,1048580,2097156,4194308,8388612,16777220,
%U A146528 33554436,67108868,134217732,268435460,536870916,1073741828
%N A146528 a(0) = 4; for n >= 1, a(n) = 2^n + 4.
%C A146528 This is one of many possible ways to extend the Platonic solids sequence A053016.
%F A146528 a(n)=A140504(n), n>0. [From _R. J. Mathar_, Nov 05 2008]
%t A146528 v[n_] := 2*(If[n == 0, 0, 2^(n - 1)] + 2); Table[v[n], {n, 0, 30}]
%Y A146528 Cf. A053016, A342759.
%Y A146528 Essentially the same as A140504.
%K A146528 nonn,less
%O A146528 0,1
%A A146528 _Roger L. Bagula_, Oct 30 2008
%E A146528 Edited by _N. J. A. Sloane_, Mar 21 2021