OFFSET
0,2
COMMENTS
Is there a formula analogous to the (conjectured) formula for A060900?
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..1000
M. Bousquet-Mélou, Plane lattice walks avoiding a quadrant, arXiv:1511.02111 [math.CO], 2015.
Mireille Bousquet-Mélou, Square lattice walks avoiding a quadrant, Journal of Combinatorial Theory, Series A, Elsevier, 2016, Special issue for the 50th anniversary of the journal, 144, pp. 37-79. Also <hal-01225710v3>. See App. A.
Kilian Raschel, Amélie Trotignon, On walks avoiding a quadrant, arXiv:1807.08610 [math.CO], 2018.
CROSSREFS
KEYWORD
nonn,easy,walk
AUTHOR
David W. Wilson, May 05 2001
STATUS
approved