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), (-1, 1, 0), (0, 0, 1), (1, 0, 0), (1, 1, -1)}.
A150158
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), (-1, 1, 0), (0, 0, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =74a(5) =295a(6) =1217a(7) =5190a(8) =22647a(9) =100615a(10) =453645a(11) =2068934a(12) =9529304a(13) =44244248a(14) =206843859a(15) =972671829a(16) =4597078503a(17) =21822430463a(18) =103989554045a(19) =497216087260
External references
- oeis: A150158