334590

Appears in sequences

• Number of (n+1) X (7+1) 0..1 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.at n=12A250768
• G.f. A(x) satisfies A(x) = 1 + x/(1+x^2)^3 * A(x)^2.at n=18A390133