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, 0, 0), (0, 1, 1), (1, -1, 0), (1, -1, 1), (1, 0, -1)}.
A149488
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, 0, 0), (0, 1, 1), (1, -1, 0), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =14a(4) =51a(5) =201a(6) =823a(7) =3436a(8) =14575a(9) =62776a(10) =273766a(11) =1204282a(12) =5337100a(13) =23810913a(14) =106823537a(15) =481534000a(16) =2179638646a(17) =9902272921a(18) =45133705547a(19) =206310531515a(20) =945515644303
External references
- oeis: A149488