%I #9 May 09 2019 10:03:20

%S 0,2,6,26,102,416,1684,6838,27746,112606,456974,1854504,7525952,

%T 30541874,123945206,502995202,2041258182,8283846440,33617556212,

%U 136426972038,553648771426,2246820826854,9118062006846,37002974944592,150165698996096,609403357129026,2473084427154950

%N The sequence denoted by p_n used in the calculation of A323260.

%H K. A. Van'kov, V. M. Zhuravlyov, <a href="https://www.mccme.ru/free-books/matpros/pdf/mp-22.pdf#page=127">Regular tilings and generating functions</a>, Mat. Pros. Ser. 3, issue 22, 2018 (127-157) [in Russian]. See Table 1.

%H <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (5,-3,-5,7,-1).

%F Van'kov and Zhuravlyov give recurrences.

%F a(n) = 2*A323266(n).

%F G.f.: 2*x^2*(x-1)^2/(1-5*x+3*x^2+5*x^3-7*x^4+x^5) . - _R. J. Mathar_, Jan 11 2019

%t LinearRecurrence[{5,-3,-5,7,-1},{0,2,6,26,102},30] (* _Harvey P. Dale_, May 09 2019 *)

%Y Cf. A323260-A323269.

%K nonn,easy

%O 1,2

%A _N. J. A. Sloane_, Jan 09 2019