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, -1, 0), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
A150803
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, -1, 0), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =133a(5) =574a(6) =2581a(7) =11673a(8) =53840a(9) =249646a(10) =1170407a(11) =5511127a(12) =26129428a(13) =124321268a(14) =594254165a(15) =2848588175a(16) =13700158744a(17) =66041949214a(18) =319147827858
External references
- oeis: A150803