3211435

Appears in sequences

• Expansion of g.f.: (1-2*x)/(1-3*x+2*x^3).at n=16A052948
• Number of n X 2 arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.at n=7A221374
• T(n,k)=Number of n X k arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, with no occupancy greater than 2.at n=37A221378