63676

Appears in sequences

• G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (1 + k*x + x^2).at n=12A202476
• Number of n X 3 arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.at n=3A221689
• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.at n=18A221693
• Number of 4Xn arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction.at n=2A221696