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), (-1, 1, -1), (1, -1, 0), (1, 0, 1)}.
A148612
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), (-1, 1, -1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =21a(5) =53a(6) =202a(7) =573a(8) =2294a(9) =7006a(10) =28944a(11) =93034a(12) =391864a(13) =1309196a(14) =5593893a(15) =19242110a(16) =83177233a(17) =292817279a(18) =1277239439a(19) =4583036003a(20) =20135459495a(21) =73405731065a(22) =324465065173
External references
- oeis: A148612