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, -1, 1), (1, 0, -1)}.
A148028
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, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =50a(7) =133a(8) =434a(9) =1275a(10) =4246a(11) =13515a(12) =46550a(13) =156419a(14) =555534a(15) =1951733a(16) =7092896a(17) =25736111a(18) =95429785a(19) =354788330a(20) =1338863594a(21) =5077947025a(22) =19463581574a(23) =75041004927a(24) =291655368276
External references
- oeis: A148028