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), (-1, 0, 1), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150819
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), (-1, 0, 1), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =139a(5) =596a(6) =2778a(7) =12535a(8) =59457a(9) =275768a(10) =1322082a(11) =6235333a(12) =30105107a(13) =143572987a(14) =696651803a(15) =3348513885a(16) =16308045874a(17) =78838993544a(18) =385062407686
External references
- oeis: A150819