OFFSET
0,3
LINKS
D. Callan, T. Mansour, Enumeration of small Wilf classes avoiding 1324 and two other 4-letter patterns, arXiv:1705.00933 [math.CO] (2017), Table 1 No 212.
MAPLE
C := (1-sqrt(1-4*x))/2/x ;
1 +x*(1 -4*x +4*x^2 -x^3 -x*(1 -4*x +2*x^2)*C)/((1 -3*x +x^2)*(1 -3*x +x^2 -x*(1 -2*x)*C)) ;
taylor(%, x=0, 40) ;
gfun[seriestolist](%) ;
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
R. J. Mathar, Nov 09 2017
STATUS
approved