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 A079285 #7 Jun 13 2015 00:50:50 %S A079285 0,2,1,5,4,13,13,34,39,89,112,233,313,610,859,1597,2328,4181,6253, %T A079285 10946,16687,28657,44320,75025,117297,196418,309619,514229,815656, %U A079285 1346269,2145541,3524578,5637351,9227465,14799280,24157817 %N A079285 First differences of A079284. %H A079285 <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (1,3,-2,-2) %F A079285 a(n)=Fib(n+2)-2^floor(n/2)(1-(1)^(n+1))/2 %F A079285 G.f.: -x*(-2+x+2*x^2) / ( (x^2+x-1)*(2*x^2-1) ). - _R. J. Mathar_, Feb 13 2015 %e A079285 a(2n) = Fib(2n+2) - 2^(n/2). a(2n+1) = Fib(2n+3) %Y A079285 Cf. A000045, A008949, A001519 (bisection), A105693 (bisection). %K A079285 easy,nonn %O A079285 0,2 %A A079285 _Paul Barry_, Feb 08 2003