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, 1)}.
A150995
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, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =38a(4) =171a(5) =796a(6) =3749a(7) =17905a(8) =86307a(9) =418396a(10) =2039335a(11) =9978881a(12) =48974426a(13) =240998345a(14) =1188333118a(15) =5869632445a(16) =29035136474a(17) =143800709201a(18) =712944995081
External references
- oeis: A150995