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, 0), (-1, 0, 1), (0, -1, 0), (1, 1, 0), (1, 1, 1)}.
A151023
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, 0), (-1, 0, 1), (0, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =40a(4) =176a(5) =808a(6) =3720a(7) =17152a(8) =81440a(9) =384448a(10) =1824448a(11) =8758400a(12) =42003840a(13) =201892480a(14) =977114240a(15) =4726665216a(16) =22901914112a(17) =111430159360a(18) =542141168640
External references
- oeis: A151023