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, 0), (-1, 1, 1), (0, 0, -1), (0, 1, 0), (1, 0, 0)}.
A149962
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, 0), (-1, 1, 1), (0, 0, -1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =16a(4) =54a(5) =191a(6) =708a(7) =2691a(8) =10500a(9) =41709a(10) =167949a(11) =686327a(12) =2833422a(13) =11805214a(14) =49617037a(15) =209963526a(16) =894400402a(17) =3831980642a(18) =16499883222a(19) =71390792327a(20) =310181111919
External references
- oeis: A149962