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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A150645
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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =119a(5) =532a(6) =2493a(7) =11751a(8) =56526a(9) =272852a(10) =1330410a(11) =6502103a(12) =31952536a(13) =157280769a(14) =776671738a(15) =3839959233a(16) =19022898390a(17) =94323668554a(18) =468299922839
External references
- oeis: A150645