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, 0, 1), (0, -1, 1), (0, 1, 0), (0, 1, 1), (1, 1, -1)}.
A150517
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, 0, 1), (0, -1, 1), (0, 1, 0), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =103a(5) =430a(6) =1888a(7) =8408a(8) =38226a(9) =175815a(10) =817224a(11) =3829788a(12) =18066154a(13) =85701157a(14) =408415216a(15) =1954027018a(16) =9380461812a(17) =45162925477a(18) =217995988510
External references
- oeis: A150517