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, 0, 1), (1, 0, 0), (1, 1, -1)}.
A149964
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, 0, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =16a(4) =54a(5) =191a(6) =722a(7) =2789a(8) =11005a(9) =44606a(10) =183005a(11) =760686a(12) =3204874a(13) =13610213a(14) =58310598a(15) =251807779a(16) =1093664345a(17) =4779427288a(18) =20995536151a(19) =92637168280a(20) =410555645864
External references
- oeis: A149964