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, 0, 1), (0, 1, -1), (1, -1, 0), (1, 0, 1)}.
A148934
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, 0, 1), (0, 1, -1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =28a(5) =100a(6) =365a(7) =1365a(8) =5334a(9) =21126a(10) =85092a(11) =349272a(12) =1447776a(13) =6067776a(14) =25694097a(15) =109597917a(16) =470986802a(17) =2037484306a(18) =8862487634a(19) =38753956670a(20) =170265385368a(21) =751193676168
External references
- oeis: A148934