414315330

Appears in sequences

• 3-dimensional Catalan numbers.at n=9A005789
• Triangle read by rows: T(n,k) = (2 * (binomial(n,k)) * (n + 2 * k + 3)!)/((k + 1)! * (k + 2)! * (n + 3)!).at n=44A087727
• Duplicate of A005789.at n=9A151334
• Number of permutations of 0..floor((3*n-1)/2) on even squares of an 3*n array such that each row, column, diagonal and (downwards) antidiagonal of even squares is increasing.at n=18A215789
• 9-dimensional Catalan numbers.at n=3A321978