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), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
A150097
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), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =67a(5) =246a(6) =946a(7) =3738a(8) =15131a(9) =62393a(10) =261234a(11) =1107945a(12) =4748851a(13) =20543866a(14) =89574958a(15) =393287068a(16) =1737215366a(17) =7714927830a(18) =34425987197a(19) =154278363561a(20) =694067730740
External references
- oeis: A150097