A323269 The sequence denoted by h_n used in the calculation of A323260.

1, 5, 19, 76, 307, 1245, 5052, 20503, 83207, 337674, 1370353, 5561177, 22568402, 91587225, 371679831, 1508353356, 6121208799, 24841126945, 100810413140, 409109434531, 1660250406747, 6737638344258, 27342725093429, 110962414029213, 450308346557186, 1827444083234205

Offset

1,2

Links

Table of n, a(n) for n=1..26.

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.

G.f.: x-x^2*(-5+6*x+4*x^2-9*x^3+2*x^4)/(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}, {1, 5, 19, 76, 307, 1245}, 30] (* Harvey P. Dale, Mar 09 2019 *)

Crossrefs

Cf. A323260-A323268.

Sequence in context: A149770 A285424 A275859 * A268815 A108981 A228678

Adjacent sequences: A323266 A323267 A323268 * A323270 A323271 A323272

Keyword

nonn,easy

Author

N. J. A. Sloane, Jan 09 2019

Status

approved