OFFSET
1,4
LINKS
Murray Tannock, Equivalence classes of mesh patterns with a dominating pattern, MSc Thesis, Reykjavik Univ., May 2016. See Appendix B2.
Murray Tannock, Henning Ulfarsson, Equivalence classes of mesh patterns with a dominating pattern, arXiv:1704.07104 [math.CO], 2017-2018.
FORMULA
G.f.: x*(1-x)*C(x) + x^2*(x^2-3*x+1)/((x-1)*(2*x-1)) (conjectured), where C(x) is the g.f. for the Catalan numbers (A000108). - Michael D. Weiner, Jan 02 2019
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jul 08 2017
STATUS
approved