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), (-1, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150702
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), (-1, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =120a(5) =445a(6) =2147a(7) =8469a(8) =41467a(9) =169499a(10) =836554a(11) =3501189a(12) =17356842a(13) =73880787a(14) =367245459a(15) =1583278732a(16) =7883708163a(17) =34330670218a(18) =171140161779a(19) =751318937513
External references
- oeis: A150702