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), (-1, 0, 1), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
A149064
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), (-1, 0, 1), (0, 1, 1), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =40a(5) =161a(6) =668a(7) =2836a(8) =12375a(9) =54900a(10) =247280a(11) =1125020a(12) =5172670a(13) =23971303a(14) =111796965a(15) =524564578a(16) =2473888979a(17) =11717814258a(18) =55713194024a(19) =265828035935
External references
- oeis: A149064