A323267 The sequence denoted by q_n used in the calculation of A323260.

0, 0, 0, 1, 5, 19, 82, 324, 1328, 5367, 21809, 88463, 359056, 1457052, 5913112, 23996513, 97382945, 395199883, 1603802802, 6508562056, 26413086624, 107189749111, 434998095205, 1765311927087, 7163999648656, 29072987143064, 117984174051328, 478804095978481, 1943085707636701, 7885442290344115

Offset

1,5

Links

Table of n, a(n) for n=1..30.

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^4*(1+2*x-2*x^2+x^3)/(x^5-7*x^4+5*x^3+3*x^2-5*x+1)/(1+x)^2 . - R. J. Mathar, Jan 11 2019

Crossrefs

Cf. A323260-A323269.

Sequence in context: A149785 A149786 A149787 * A340736 A094726 A149788

Adjacent sequences: A323264 A323265 A323266 * A323268 A323269 A323270

Keyword

nonn,easy

Author

N. J. A. Sloane, Jan 09 2019

Status

approved