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, 0, 1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150506
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, 0, 1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =102a(5) =414a(6) =1805a(7) =7815a(8) =35323a(9) =158644a(10) =733072a(11) =3369245a(12) =15799972a(13) =73770858a(14) =349586259a(15) =1650776523a(16) =7883670078a(17) =37542772998a(18) =180365623658a(19) =864515802872
External references
- oeis: A150506