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, 0), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
A150072
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, 0), (0, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =65a(5) =235a(6) =924a(7) =3584a(8) =14685a(9) =59739a(10) =252404a(11) =1057050a(12) =4552029a(13) =19472054a(14) =85142974a(15) =369881012a(16) =1635207275a(17) =7189370970a(18) =32073487208a(19) =142355800384a(20) =639620083601
External references
- oeis: A150072