|
%I #10 Oct 20 2019 07:09:04
%S 1,3,7,21,45,135,291,873,1881,5643,12159,36477,78597,235791,508059,
%T 1524177,3284145,9852435,21229047,63687141,137226717,411680151,
%U 887047443,2661142329,5733964809,17201894427,37064931183,111194793549,239591481525,718774444575
%N a(n) = T(n,0) + T(n,1) + ... + T(n,n), T given by A027144.
%H Colin Barker, <a href="/A027151/b027151.txt">Table of n, a(n) for n = 0..1000</a>
%H <a href="/index/Rec#order_04">Index entries for linear recurrences with constant coefficients</a>, signature (0,6,0,3).
%F G.f.: (1 + 3*x)*(1 + x^2) / (1 - 6*x^2 - 3*x^4).
%F a(n) = 6*a(n-2) + 3*a(n-4) for n>3. - _Colin Barker_, Jan 18 2018
%o (PARI) Vec((1 + 3*x)*(1 + x^2) / (1 - 6*x^2 - 3*x^4) + O(x^40)) \\ _Colin Barker_, Jan 18 2018
%Y Cf. A141041 (bisection), A287811 (bisection).
%K nonn,easy
%O 0,2
%A _Clark Kimberling_
|
