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), (0, 1, 0), (1, 0, 0)}.
A150046
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), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =60a(5) =213a(6) =783a(7) =2954a(8) =11266a(9) =43797a(10) =172615a(11) =688499a(12) =2767243a(13) =11196425a(14) =45622379a(15) =187050013a(16) =770927359a(17) =3190273470a(18) =13253110663a(19) =55262512845a(20) =231217284417a(21) =970244076921
External references
- oeis: A150046