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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
A149386
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, 0), (-1, 1, 1), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =49a(5) =184a(6) =772a(7) =3233a(8) =14051a(9) =61341a(10) =273080a(11) =1225875a(12) =5565975a(13) =25405343a(14) =116867558a(15) =540770706a(16) =2513900350a(17) =11735911545a(18) =55025784823a(19) =258855070126
External references
- oeis: A149386