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A323269
The sequence denoted by h_n used in the calculation of A323260.
7
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
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.
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
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Jan 09 2019
STATUS
approved