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, 0, 0), (-1, 1, 1), (1, -1, 1), (1, 1, 0)}.
A149309
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, 0, 0), (-1, 1, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =48a(5) =160a(6) =736a(7) =2661a(8) =12446a(9) =47969a(10) =227591a(11) =907792a(12) =4352482a(13) =17757644a(14) =85648585a(15) =356525315a(16) =1728298464a(17) =7296649603a(18) =35514264747a(19) =151581065164a(20) =739817165935
External references
- oeis: A149309