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, 0, 0), (0, -1, 1), (0, 0, 1), (0, 1, 0), (1, 1, -1)}.
A150204
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, 0, 0), (0, -1, 1), (0, 0, 1), (0, 1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =80a(5) =322a(6) =1348a(7) =5803a(8) =25527a(9) =114189a(10) =517672a(11) =2372514a(12) =10971518a(13) =51120345a(14) =239711902a(15) =1130200367a(16) =5353871150a(17) =25466049605a(18) =121567263331a(19) =582169210310
External references
- oeis: A150204