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), (-1, -1, 1), (-1, 1, 0), (1, 0, 0)}.
A148045
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), (-1, -1, 1), (-1, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =10a(5) =20a(6) =58a(7) =119a(8) =446a(9) =1044a(10) =3448a(11) =7986a(12) =31689a(13) =79898a(14) =281279a(15) =694389a(16) =2846170a(17) =7495572a(18) =27436672a(19) =70493078a(20) =295037033a(21) =799668270a(22) =3004460457a(23) =7933577956a(24) =33692390947a(25) =93207860220a(26) =356841845618a(27) =961310281239
External references
- oeis: A148045