281514

Appears in sequences

• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, -1, 1), (-1, 0, 1), (-1, 1, -1), (1, 0, 0)}.at n=14A148013
• Triangle T(n,k) by rows: number of ways k dominoes can be placed on an n X n chessboard, k>=0.at n=36A242861
• Number of 4-matchings of the n X n grid graph.at n=6A243215