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), (0, -1, 1), (0, 1, 1), (1, 0, -1), (1, 1, 0)}.
A150844
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), (0, -1, 1), (0, 1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =138a(5) =616a(6) =2820a(7) =13135a(8) =61942a(9) =294979a(10) =1415255a(11) =6831215a(12) =33132451a(13) =161335664a(14) =788202460a(15) =3861396249a(16) =18961249047a(17) =93294506192a(18) =459822319237
External references
- oeis: A150844