127630

Appears in sequences

• Number of binary strings of length n avoiding "squares" (that is, repeated blocks of the form xx) with |x| > 3.at n=18A230177
• Number of (3+1) X (n+1) 0..1 arrays with nondecreasing min(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=9A250800