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, 0), (-1, 1, 1), (1, 0, 1), (1, 1, 0)}.
A150704
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, 0), (-1, 1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =122a(5) =448a(6) =2152a(7) =8472a(8) =41392a(9) =168744a(10) =830394a(11) =3472922a(12) =17180492a(13) =73077518a(14) =362531322a(15) =1562875216a(16) =7770405164a(17) =33836355878a(18) =168454755496a(19) =739701307326
External references
- oeis: A150704