A323265 The sequence denoted by p_n used in the calculation of A323260.

0, 2, 6, 26, 102, 416, 1684, 6838, 27746, 112606, 456974, 1854504, 7525952, 30541874, 123945206, 502995202, 2041258182, 8283846440, 33617556212, 136426972038, 553648771426, 2246820826854, 9118062006846, 37002974944592, 150165698996096, 609403357129026, 2473084427154950

Offset

1,2

Links

Table of n, a(n) for n=1..27.

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 (5,-3,-5,7,-1).

Formula

Van'kov and Zhuravlyov give recurrences.

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

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

Mathematica

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

Crossrefs

Cf. A323260-A323269.

Sequence in context: A027239 A191821 A290958 * A285024 A192403 A282618

Adjacent sequences: A323262 A323263 A323264 * A323266 A323267 A323268

Keyword

nonn,easy

Author

N. J. A. Sloane, Jan 09 2019

Status

approved