74429

Appears in sequences

• Number of n-step spiral self-avoiding walks on hexagonal lattice, where at each step one may continue in same direction or make turn of 2*Pi/3 counterclockwise.at n=43A000511
• Numbers k such that A109631(k) - A109631(k+1) = A109631(k+2).at n=25A109715
• G.f. satisfies A(x) = 1 + x*A(x)^3 / (1 - x*A(x))^2.at n=7A367232
• G.f. A(x) satisfies A(x) = C(x) / (1 - x*A(x)^2), where C(x) is the g.f. of A000108.at n=7A381826