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, 0), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.
A149695
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, 0), (0, 0, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =67a(5) =283a(6) =1215a(7) =5229a(8) =23539a(9) =105631a(10) =478363a(11) =2203783a(12) =10170875a(13) =47141319a(14) =220757939a(15) =1035081113a(16) =4868748935a(17) =23045709931a(18) =109220598807a(19) =518814819579
External references
- oeis: A149695