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), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
A150560
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), (0, 1, 0), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =106a(5) =443a(6) =1931a(7) =8532a(8) =38556a(9) =175744a(10) =812102a(11) =3775043a(12) =17708060a(13) =83425112a(14) =395532431a(15) =1881427225a(16) =8991123869a(17) =43077291303a(18) =207115573368a(19) =997843270871
External references
- oeis: A150560