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, 1), (0, 1, 1), (1, -1, -1), (1, 1, 0)}.
A150508
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, 1), (0, 1, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =102a(5) =421a(6) =1825a(7) =8006a(8) =35895a(9) =162577a(10) =744984a(11) =3439518a(12) =15996637a(13) =74810939a(14) =351643452a(15) =1659782629a(16) =7863638164a(17) =37376167597a(18) =178163667538a(19) =851434786181
External references
- oeis: A150508