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, 1, -1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
A150198
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, 1, -1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =79a(5) =309a(6) =1253a(7) =5199a(8) =21953a(9) =94078a(10) =407603a(11) =1782008a(12) =7852152a(13) =34826220a(14) =155346976a(15) =696396185a(16) =3135324925a(17) =14170200056a(18) =64262626325a(19) =292332241071
External references
- oeis: A150198