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, -1, 1), (-1, 1, 1), (1, 0, 0), (1, 1, 0)}.
A150317
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, -1, 1), (-1, 1, 1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =90a(5) =322a(6) =1457a(7) =5567a(8) =26084a(9) =104654a(10) =496743a(11) =2045612a(12) =9842455a(13) =41463219a(14) =200634301a(15) =857222498a(16) =4176230658a(17) =18078487719a(18) =88343440571a(19) =385849421800
External references
- oeis: A150317