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, 1), (0, -1, 1), (0, 1, 1), (1, 1, -1), (1, 1, 0)}.
A150879
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, 1), (0, -1, 1), (0, 1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =148a(5) =681a(6) =3201a(7) =15277a(8) =73616a(9) =357316a(10) =1744329a(11) =8549549a(12) =42045074a(13) =207306429a(14) =1024243596a(15) =5069175930a(16) =25123000907a(17) =124653578501a(18) =619096123727
External references
- oeis: A150879