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), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
A150433
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), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =98a(5) =409a(6) =1758a(7) =7795a(8) =35205a(9) =160821a(10) =742982a(11) =3468265a(12) =16299943a(13) =77032454a(14) =366093124a(15) =1747822983a(16) =8373252262a(17) =40244756832a(18) =194020661020a(19) =937661379787
External references
- oeis: A150433