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, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
A150545
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, 1), (0, 1, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =26a(4) =104a(5) =424a(6) =1799a(7) =7702a(8) =33516a(9) =147394a(10) =652986a(11) =2914743a(12) =13083333a(13) =58999874a(14) =267246535a(15) =1214730328a(16) =5539131519a(17) =25330977489a(18) =116127158302a(19) =533596390917
External references
- oeis: A150545