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), (-1, 0, 1), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
A149443
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), (-1, 0, 1), (0, -1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =47a(5) =190a(6) =763a(7) =3227a(8) =13927a(9) =60718a(10) =270671a(11) =1215297a(12) =5514230a(13) =25266201a(14) =116347060a(15) =539873745a(16) =2516929673a(17) =11787991535a(18) =55463882701a(19) =261804584175
External references
- oeis: A149443