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A323265 The sequence denoted by p_n used in the calculation of A323260. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified November 12 04:21 EST 2019. Contains 329051 sequences. (Running on oeis4.)