OFFSET
0,3
LINKS
J. Choi, N. Pippenger, Counting the Angels and Devils in Escher's Circle Limit IV, arXiv preprint arXiv:1310.1357 [math.CO], 2013.
Index entries for linear recurrences with constant coefficients, signature (0, 1, 2, 1, 0, -1).
MATHEMATICA
LinearRecurrence[{0, 1, 2, 1, 0, -1}, {1, 1, 2, 4, 5, 9}, 45] (* Jean-François Alcover, Feb 12 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 24 2013
STATUS
approved