142005

Appears in sequences

• Expansion of (1-x)/(1+2*x+x^2-2*x^3).at n=22A078063
• Number of ways to place 4 points on a triangular grid of side length n so that no three of them are vertices of an equilateral triangle with sides parallel to the grid.at n=6A243213
• Expansion of Product_{k>=1} (1 + x^k)^(5^(k-1)).at n=8A343362