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, 0), (0, -1, 1), (1, 0, 1), (1, 1, -1)}.
A148858
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, 0), (0, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =28a(5) =96a(6) =349a(7) =1266a(8) =4872a(9) =18937a(10) =74824a(11) =300666a(12) =1221397a(13) =5003868a(14) =20748125a(15) =86640057a(16) =363955361a(17) =1541316904a(18) =6561178732a(19) =28057372888a(20) =120671313034a(21) =521071872996
External references
- oeis: A148858