OFFSET
0,2
LINKS
Tomislav Došlić and Frode Måløy, Chain hexagonal cacti: Matchings and independent sets, Discr. Math., 310 (2010), 1676-1690.
Index entries for linear recurrences with constant coefficients, signature (12,8).
MATHEMATICA
CoefficientList[Series[(1+6x)/(1-12x-8x^2), {x, 0, 20}], x] (* or *) LinearRecurrence[ {12, 8}, {1, 18}, 20]
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 22 2010
STATUS
approved