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, 0), (0, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, -1)}.
A150671
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, 0), (0, 0, 1), (0, 1, -1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =25a(4) =104a(5) =395a(6) =1684a(7) =7001a(8) =30459a(9) =132707a(10) =589627a(11) =2635350a(12) =11912936a(13) =54155234a(14) =248061853a(15) =1141759359a(16) =5283299578a(17) =24549896486a(18) =114532390929a(19) =536170988287
External references
- oeis: A150671