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, 0, 1), (0, 0, 1), (1, 0, -1), (1, 1, 0)}.
A150234
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, 0, 1), (0, 0, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =82a(5) =329a(6) =1356a(7) =5728a(8) =24771a(9) =108333a(10) =480976a(11) =2155838a(12) =9745021a(13) =44411257a(14) =203558361a(15) =938658857a(16) =4349164000a(17) =20238009107a(18) =94557029374a(19) =443272736527
External references
- oeis: A150234