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, 1, 1), (0, -1, 0), (1, 1, -1), (1, 1, 1)}.
A149783
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, 1, 1), (0, -1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =81a(5) =349a(6) =1555a(7) =6991a(8) =32179a(9) =149207a(10) =697483a(11) =3282551a(12) =15546345a(13) =73935429a(14) =353096835a(15) =1692271669a(16) =8134573751a(17) =39203030799a(18) =189383452871a(19) =916758226553
External references
- oeis: A149783