A323268 The sequence denoted by r_n used in the calculation of A323260.

0, 0, 0, 0, 2, 6, 28, 108, 444, 1792, 7282, 29538, 119888, 486512, 1974392, 8012464, 32516266, 131957670, 535511468, 2173215852, 8819357908, 35790772064, 145246329946, 589439543490, 2392067156800, 9707501550336, 39395042101392, 159873200546432, 648798399230418, 2632957627701382

Offset

1,5

Links

Table of n, a(n) for n=1..30.

K. A. Van'kov, V. M. Zhuravlyov, Regular tilings and generating functions, Mat. Pros. Ser. 3, issue 22, 2018 (127-157) [in Russian]. See Table 1.

Index entries for linear recurrences with constant coefficients, signature (4,2,-8,2,6,-1).

Formula

Van'kov and Zhuravlyov give recurrences.

G.f.: -2*x^5*(x-1)/(1+x)/(x^5-7*x^4+5*x^3+3*x^2-5*x+1) . - R. J. Mathar, Jan 11 2019

Crossrefs

Cf. A323260-A323269.

Sequence in context: A340471 A242511 A360035 * A089748 A047125 A189238

Adjacent sequences: A323265 A323266 A323267 * A323269 A323270 A323271

Keyword

nonn,easy

Author

N. J. A. Sloane, Jan 09 2019

Status

approved