238552980386
domain: N
Appears in sequences
- Number of paths from (0,0) to (3n,0) that stay in first quadrant (but may touch horizontal axis) and where each step is (2,1), (1,2) or (1,-1).at n=13A027307
- Length of list created by n substitutions k -> Range[-abs(k+1), abs(k-1), 2] starting with {0}.at n=25A084078
- Number of paths from (0,0) if n is even, or from (2,1) if n is odd, to (3n,0) that stay in first quadrant (but may touch horizontal axis) and where each step is (2,1), (1,2) or (1,-1).at n=26A137842