510038

Appears in sequences

• Number of permutations of length n which avoid the patterns 1234, 3142, 3421.at n=22A116767
• 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, 0, 0), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.at n=10A150252