407620

Appears in sequences

• Number of 3Xn arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 3Xn array.at n=14A219854
• Triangle T(n,k) by rows: number of ways k dominoes can be placed on an n X n chessboard, k>=0.at n=25A242861
• Number of quarter-square matchings of the n X n grid graph.at n=5A243221