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, 0), (-1, 0, 1), (-1, 1, -1), (1, 0, 0), (1, 1, 0)}.
A150312
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, 0), (-1, 0, 1), (-1, 1, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =86a(5) =300a(6) =1312a(7) =4927a(8) =22318a(9) =87653a(10) =405601a(11) =1641554a(12) =7705358a(13) =31868767a(14) =151111706a(15) =635318464a(16) =3035146773a(17) =12925910615a(18) =62107324768a(19) =267260693481
External references
- oeis: A150312