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, 1, 0), (0, 1, -1), (1, -1, 0), (1, 1, 1)}.
A149719
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, 1, 0), (0, 1, -1), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =73a(5) =293a(6) =1321a(7) =5683a(8) =26401a(9) =118077a(10) =557041a(11) =2552623a(12) =12165169a(13) =56663723a(14) =272055017a(15) =1282219173a(16) =6190286979a(17) =29434445015a(18) =142709451071a(19) =683201772937
External references
- oeis: A149719