A323263 The sequence denoted by d_n used in the calculation of A323260.

0, 0, 1, 3, 12, 49, 197, 802, 3251, 13199, 53558, 217359, 882077, 3579664, 14526997, 58953567, 239245700, 970908389, 3940146321, 15989925914, 64890414991, 263338678635, 1068682634486, 4336934396651, 17600173665641, 71425132301280, 289857908288985, 1176303134354955, 4773680566664252, 19372579641254793, 78617921060228045

Offset

1,4

Links

Table of n, a(n) for n=1..31.

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.: -x^2*(x^2-x-1)*(x-1)^2/(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: A134589 A371436 A178872 * A344136 A248347 A037758

Adjacent sequences: A323260 A323261 A323262 * A323264 A323265 A323266

Keyword

nonn,easy

Author

N. J. A. Sloane, Jan 09 2019

Status

approved