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, 1), (0, 1, -1), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150223
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, 1), (0, 1, -1), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =84a(5) =341a(6) =1445a(7) =6309a(8) =27788a(9) =125044a(10) =570195a(11) =2614993a(12) =12120861a(13) =56615783a(14) =265431493a(15) =1252372891a(16) =5937958979a(17) =28227542252a(18) =134746021085a(19) =645350756373
External references
- oeis: A150223