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, 1), (-1, 0, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
A148900
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, 1), (-1, 0, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =31a(5) =107a(6) =411a(7) =1571a(8) =6385a(9) =25550a(10) =105633a(11) =440141a(12) =1861495a(13) =7884724a(14) =33865441a(15) =146240291a(16) =635169909a(17) =2770387952a(18) =12169281883a(19) =53629296915a(20) =237212288003
External references
- oeis: A148900