1803949

Appears in sequences

• T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor.at n=29A221125
• Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor.at n=6A221126
• Expansion of g.f. A(x) satisfying A(x) = Series_Reversion( x - x*A'(x)*A(x) ).at n=7A360578