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), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150854
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), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =140a(5) =636a(6) =2936a(7) =13826a(8) =65614a(9) =314468a(10) =1515720a(11) =7345854a(12) =35748676a(13) =174575962a(14) =855039978a(15) =4197881068a(16) =20653255838a(17) =101789865690a(18) =502446224746
External references
- oeis: A150854