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, 0, 0)}.
A148037
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, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =55a(7) =137a(8) =489a(9) =1337a(10) =4963a(11) =14489a(12) =56081a(13) =172374a(14) =685860a(15) =2193107a(16) =8924006a(17) =29455832a(18) =121957898a(19) =413105672a(20) =1734505507a(21) =6003091829a(22) =25496609376a(23) =89865317945a(24) =385361938143
External references
- oeis: A148037