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), (1, 0, 1), (1, 1, -1)}.
A149396
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), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =50a(5) =187a(6) =801a(7) =3367a(8) =14750a(9) =64496a(10) =288283a(11) =1298078a(12) =5916459a(13) =27107847a(14) =125107445a(15) =580279403a(16) =2704828242a(17) =12656086712a(18) =59445058605a(19) =280159509962
External references
- oeis: A149396