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, 0, 0), (1, 1, -1)}.
A150258
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, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =86a(5) =358a(6) =1532a(7) =6738a(8) =30142a(9) =136742a(10) =627494a(11) =2904854a(12) =13552541a(13) =63619497a(14) =300280369a(15) =1423783749a(16) =6778027336a(17) =32379599861a(18) =155157977040a(19) =745514606550
External references
- oeis: A150258