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, 0, -1), (0, 1, 1), (1, 0, 1)}.
A150479
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, 0, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =25a(4) =100a(5) =398a(6) =1652a(7) =6956a(8) =29787a(9) =128925a(10) =563042a(11) =2478992a(12) =10987489a(13) =48981786a(14) =219416367a(15) =987118004a(16) =4458156696a(17) =20203631329a(18) =91841898320a(19) =418644067776
External references
- oeis: A150479