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, 1, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
A148168
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, 1, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =31a(6) =102a(7) =340a(8) =1203a(9) =4344a(10) =16173a(11) =61520a(12) =238575a(13) =940236a(14) =3756059a(15) =15180801a(16) =62001672a(17) =255519383a(18) =1061764788a(19) =4443897040a(20) =18722145717a(21) =79344717504a(22) =338078438238
External references
- oeis: A148168