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, 0), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
A148878
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, 0), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =30a(5) =95a(6) =373a(7) =1337a(8) =5491a(9) =20879a(10) =87823a(11) =348878a(12) =1495592a(13) =6116233a(14) =26582687a(15) =111153122a(16) =488390316a(17) =2076955693a(18) =9206018343a(19) =39681877464a(20) =177159455338a(21) =772030567083
External references
- oeis: A148878