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, 1), (0, 0, -1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
A150224
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, 1), (0, 0, -1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =84a(5) =348a(6) =1481a(7) =6468a(8) =28704a(9) =129540a(10) =591232a(11) =2725221a(12) =12661345a(13) =59210568a(14) =278508409a(15) =1316337557a(16) =6248468083a(17) =29770699443a(18) =142309486586a(19) =682256163533
External references
- oeis: A150224