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, 0, 0), (1, -1, 0), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150987
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, 0, 0), (1, -1, 0), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =37a(4) =165a(5) =740a(6) =3430a(7) =15932a(8) =75138a(9) =355409a(10) =1695214a(11) =8106953a(12) =38966946a(13) =187714076a(14) =907312159a(15) =4393567130a(16) =21325956547a(17) =103672502874a(18) =504876131674
External references
- oeis: A150987