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 A082414 #14 Sep 08 2018 21:53:04 %S A082414 1,8,72,688,6752,67008,668032,6672128,66688512,666754048,6667016192, %T A082414 66668064768,666672259072,6666689036288,66666756145152, %U A082414 666667024580608,6666668098322432,66666672393289728,666666689573158912,6666666758292635648 %N A082414 a(n) = (2*10^n + 4^n)/3. %C A082414 Binomial transform of A082413. %H A082414 Nathaniel Johnston, <a href="/A082414/b082414.txt">Table of n, a(n) for n = 0..250</a> %H A082414 <a href="/index/Rec#order_02">Index entries for linear recurrences with constant coefficients</a>, signature (14,-40). %F A082414 G.f.: (1-6*x)/((1-4*x)*(1-10*x)). %F A082414 E.g.f.: (2*exp(10*x) + exp(4*x))/3. %F A082414 a(n) = (2*10^n + 4^n)/3. %p A082414 seq((2*10^n+4^n)/3,n=0..19); # _Nathaniel Johnston_, Jun 26 2011 %o A082414 (PARI) a(n) = (2*10^n+4^n)/3; \\ _Altug Alkan_, Sep 08 2018 %Y A082414 Cf. A082412, A082413. %K A082414 easy,nonn %O A082414 0,2 %A A082414 _Paul Barry_, Apr 23 2003