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), (0, 1, -1), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
A150460
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), (0, 1, -1), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =97a(5) =390a(6) =1611a(7) =6794a(8) =29091a(9) =126090a(10) =551977a(11) =2436019a(12) =10824817a(13) =48383210a(14) =217343673a(15) =980622641a(16) =4441459717a(17) =20184954064a(18) =92013044261a(19) =420585882547
External references
- oeis: A150460