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), (-1, 0, 1), (-1, 1, -1), (1, -1, 0), (1, 0, 0)}.
A148035
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), (-1, 0, 1), (-1, 1, -1), (1, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =53a(7) =126a(8) =431a(9) =1141a(10) =4046a(11) =11293a(12) =42267a(13) =125308a(14) =476076a(15) =1453581a(16) =5712452a(17) =18140643a(18) =71884868a(19) =232645573a(20) =943383733a(21) =3139026545a(22) =12795771881a(23) =43148544469a(24) =178859656585a(25) =615743018905
External references
- oeis: A148035