OFFSET
0,2
LINKS
I. Gessel and G. Xin, The Generating Function of Ternary Trees and Continued Fractions, arXiv:math/0505217 [math.CO], 2005.
FORMULA
D-finite with recurrence: 2*(2*n-1)*(n-2)*a(n) + (-72*(n-3)^2-171*n+420)*a(n-1) + (297*(n-3)^2+675*n-1674)*a(n-2) - 81*(3*n-5)*(3*n-7)*a(n-3) = 0. - Georg Fischer, Nov 30 2022
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Feb 04 2009
STATUS
approved