131937

Appears in sequences

• Number of gap-free compositions of n.at n=18A107428
• 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, 1), (-1, 0, 0), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.at n=9A150246