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), (0, 0, -1), (0, 1, 0), (1, 0, 1), (1, 1, 0)}.
A151136
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), (0, 0, -1), (0, 1, 0), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =46a(4) =202a(5) =914a(6) =4230a(7) =19872a(8) =94399a(9) =452259a(10) =2181014a(11) =10573296a(12) =51475524a(13) =251476927a(14) =1232106449a(15) =6051282793a(16) =29780747282a(17) =146818968545a(18) =724903922819
External references
- oeis: A151136