10306296

Appears in sequences

• Number of walks of length 2*n+2 from origin to (1,1) in a square lattice.at n=6A135389
• Number of nX1 0..1 arrays with the counts of all possible adjacent horizontal and vertical pair sum values being within one of each other.at n=29A203631
• a(n) = binomial(n - 1, ceiling(n/2)) * binomial(n - 1, ceiling(n/2) - 1).at n=15A378070