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 A036681 #7 Jun 27 2022 08:26:33 %S A036681 2,5,14,32,71,149,304,604,1177,2256,4266,7974,14758,27079,49312,89200, %T A036681 160393,286867,510596,904838,1597091,2808672,4922820,8601660,14986730, %U A036681 26042201,45141410,78067712,134719931,232014593,398818552,684322432 %N A036681 T(n+2,2) with T as in A036355. %H A036681 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (3,0,-5,0,3,1). %F A036681 G.f.: (2+x)*(1-x)/(1-x-x^2)^3. %Y A036681 Cf. A212338 (partial sums) %K A036681 nonn,easy %O A036681 0,1 %A A036681 _Floor van Lamoen_