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, 0, 0), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149739
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, 0, 0), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =77a(5) =307a(6) =1417a(7) =6181a(8) =28841a(9) =130211a(10) =616889a(11) =2855129a(12) =13626469a(13) =63959761a(14) =307535581a(15) =1459756265a(16) =7050834891a(17) =33718778041a(18) =163569203413a(19) =787091296573
External references
- oeis: A149739