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A323268 The sequence denoted by r_n used in the calculation of A323260. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A322507 A340471 A242511 * A089748 A047125 A189238

Adjacent sequences:  A323265 A323266 A323267 * A323269 A323270 A323271

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Jan 09 2019

STATUS

approved

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Last modified January 20 03:25 EST 2022. Contains 350467 sequences. (Running on oeis4.)