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, 1), (-1, 1, 1), (1, -1, -1), (1, 1, 0)}.
A149165
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, 1), (-1, 1, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =41a(5) =121a(6) =564a(7) =1898a(8) =8998a(9) =32554a(10) =156240a(11) =592929a(12) =2866956a(13) =11256910a(14) =54711837a(15) =220307006a(16) =1074842238a(17) =4413112774a(18) =21592348681a(19) =90038673397a(20) =441513104951
External references
- oeis: A149165