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), (-1, 0, -1), (1, -1, 1), (1, 1, 0)}.
A149099
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), (-1, 0, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =33a(5) =90a(6) =359a(7) =1162a(8) =4574a(9) =16165a(10) =64071a(11) =237075a(12) =951939a(13) =3623367a(14) =14724617a(15) =57190833a(16) =234724423a(17) =925809364a(18) =3830986212a(19) =15295021756a(20) =63722357191a(21) =256945228387
External references
- oeis: A149099