26191

Appears in sequences

• T(n,n), array T as in A047089.at n=9A047091
• Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: (1 - 2*x^2)/(1 - 4*x + x^2 + 2*x^3).at n=8A180144
• Number of length 3+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=17A248540
• Expansion of Product_{k>=1} (1 + x^k)^A002131(k).at n=19A301798
• (1/8) * number of ways to select 3 distinct points forming a triangle of unsigned area = 1 from a square of grid points with side length n.at n=20A320544