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, 0, 1), (0, 0, -1), (1, -1, -1), (1, 1, 1)}.
A149598
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, 0, 1), (0, 0, -1), (1, -1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =59a(5) =225a(6) =933a(7) =3823a(8) =16233a(9) =69369a(10) =301099a(11) =1315451a(12) =5802899a(13) =25746201a(14) =114961725a(15) =515787391a(16) =2324699601a(17) =10518350007a(18) =47762776009a(19) =217552606081a(20) =993787275321
External references
- oeis: A149598