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), (1, 0, -1), (1, 0, 1), (1, 1, -1)}.
A149103
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), (1, 0, -1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =33a(5) =96a(6) =365a(7) =1256a(8) =4738a(9) =17499a(10) =67405a(11) =257304a(12) =1010718a(13) =3952610a(14) =15734129a(15) =62646598a(16) =252260108a(17) =1017085209a(18) =4137530712a(19) =16846884916a(20) =69094767176a(21) =283689835603
External references
- oeis: A149103