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, 0), (0, -1, 1), (1, 0, 0), (1, 1, -1), (1, 1, 0)}.
A150406
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, 0), (0, -1, 1), (1, 0, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =93a(5) =375a(6) =1568a(7) =6738a(8) =29524a(9) =131397a(10) =592474a(11) =2699383a(12) =12408001a(13) =57468088a(14) =267866657a(15) =1255563128a(16) =5913784441a(17) =27972890308a(18) =132815595779a(19) =632722358676
External references
- oeis: A150406