25940

Appears in sequences

• Expansion of (1-x-x^2)/(1-3x-x^2).at n=9A052991
• Fixed-j dispersion for Q = 13: array D(g,h) (g, h >= 1), read by ascending antidiagonals.at n=19A120862
• a(n) = 3*a(n-2) + a(n-4), a(0)=a(1)=0, a(2)=1, a(3)=2.at n=19A305889
• a(n) is the number of edges formed by n-secting the angles of a decagon.at n=27A335802