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, 0), (0, 1, 1), (1, -1, -1), (1, 0, -1)}.
A148832
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, 0), (0, 1, 1), (1, -1, -1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =27a(5) =88a(6) =325a(7) =1204a(8) =4601a(9) =18133a(10) =72686a(11) =294197a(12) =1216167a(13) =5065413a(14) =21297716a(15) =90542800a(16) =387277663a(17) =1667992428a(18) =7234627401a(19) =31523898473a(20) =138104950452a(21) =607877034424
External references
- oeis: A148832