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, 0, 1), (-1, 1, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
A148917
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, 0, 1), (-1, 1, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =33a(5) =119a(6) =542a(7) =2233a(8) =10559a(9) =46516a(10) =224322a(11) =1026708a(12) =5008409a(13) =23474135a(14) =115329173a(15) =549092258a(16) =2710308246a(17) =13044957193a(18) =64594204771a(19) =313331706590
External references
- oeis: A148917