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, 0), (0, -1, 1), (1, 0, 0), (1, 1, 0)}.
A150334
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, 0), (0, -1, 1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =84a(5) =320a(6) =1246a(7) =5066a(8) =20658a(9) =86447a(10) =363905a(11) =1551717a(12) =6680516a(13) =28928013a(14) =126428930a(15) =554487973a(16) =2448780826a(17) =10853451220a(18) =48323714099a(19) =215999075802a(20) =968342883670
External references
- oeis: A150334