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 A373245 #26 Jun 01 2024 18:20:08
%S A373245 1,2,4,9,22,55,136,331,798,1919,4620,11143,26906,64987,156944,378939,
%T A373245 914822,2208455,5331476,12871151,31073778,75019219,181113240,
%U A373245 437246723,1055606686,2548458047,6152518684,14853491319,35859501322,86572502155,209004522016
%N A373245 Binomial transform of A135318.
%H A373245 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (4,-5,2,2).
%F A373245 G.f.: (1 - 2*x + x^2 + x^3)/((1 - 2*x - x^2)*(1 - 2*x + 2*x^2)). - _Vaclav Kotesovec_, May 29 2024
%F A373245 a(n) = A114203(n+1)/2. - _Hugo Pfoertner_, May 29 2024
%F A373245 E.g.f.: exp(x)*(2*cos(x) + 4*cosh(sqrt(2)*x) + 3*sqrt(2)*sinh(sqrt(2)*x))/6. - _Stefano Spezia_, May 29 2024
%t A373245 CoefficientList[Series[(1 - 2*x + x^2 + x^3)/((1 - 2*x - x^2)*(1 - 2*x + 2*x^2)), {x, 0, 30}], x] (* _Vaclav Kotesovec_, May 29 2024 *)
%Y A373245 Cf. A135318.
%Y A373245 Cf. A114203.
%K A373245 nonn,easy
%O A373245 0,2
%A A373245 _Paul Curtz_, May 29 2024
%E A373245 More terms from _Vaclav Kotesovec_, May 29 2024