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), (0, -1, 1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
A150631
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), (0, -1, 1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =115a(5) =501a(6) =2266a(7) =10414a(8) =48673a(9) =229899a(10) =1095774a(11) =5259354a(12) =25385793a(13) =123107126a(14) =599282303a(15) =2926781377a(16) =14332693879a(17) =70352155139a(18) =346012928712
External references
- oeis: A150631