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), (0, 1, -1), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
A150760
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), (0, 1, -1), (1, 0, -1), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =120a(5) =504a(6) =2126a(7) =9202a(8) =40108a(9) =176926a(10) =785348a(11) =3510484a(12) =15771956a(13) =71179114a(14) =322554724a(15) =1466458866a(16) =6688563260a(17) =30585834766a(18) =140219147104a(19) =644209243192
External references
- oeis: A150760