187520

Appears in sequences

• Expansion of (1-x)/(1-2*x^2+2*x^3).at n=22A078025
• a(n) = 2*a(n-2) + 2*a(n-3).at n=23A107383
• The function W_n(6) (see Borwein et al. reference for definition).at n=31A169711