66745536

Appears in sequences

• Number of walks on square lattice. Column y=2 of A052174.at n=14A005560
• Triangle read by rows: T(n, k) = binomial(2*n+1, n-k)^2*(2*k+1)/(2*n+1).at n=37A067802
• a(n) = binomial(n+7,7) * binomial(n+10,7).at n=7A105943
• a(n) = binomial(n+7,7) * binomial(n+10,10).at n=7A107422
• a(n) is the number of walks from (0,0) to (0,2) that remain in the upper half-plane y >= 0 using 2*n unit steps either up (U), down (D), left (L) or right (R).at n=7A145601