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, 1, -1), (-1, 1, 1), (1, 0, 0), (1, 1, 1)}.
A150708
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, 1, -1), (-1, 1, 1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =122a(5) =452a(6) =2208a(7) =8698a(8) =42938a(9) =175234a(10) =870066a(11) =3635546a(12) =18103834a(13) =76938626a(14) =383743186a(15) =1651914246a(16) =8246876034a(17) =35861486132a(18) =179131833684a(19) =785374015858
External references
- oeis: A150708