2383928

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, 1, 0)}.at n=12A149161
• Related to number of mesh patterns of length 2 that avoid the pattern 231 or 321. For details see the comment section.at n=14A289450