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), (-1, 0, 1), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
A151026
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), (-1, 0, 1), (1, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =40a(4) =192a(5) =840a(6) =4136a(7) =19072a(8) =93984a(9) =443200a(10) =2197056a(11) =10529408a(12) =52254080a(13) =252754560a(14) =1257233536a(15) =6125430784a(16) =30490513920a(17) =149263315968a(18) =743819838464
External references
- oeis: A151026