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), (0, 1, -1), (0, 1, 0), (1, 0, 1), (1, 1, 0)}.
A151154
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), (0, 1, -1), (0, 1, 0), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =47a(4) =208a(5) =950a(6) =4444a(7) =21039a(8) =100703a(9) =485804a(10) =2356638a(11) =11487467a(12) =56199491a(13) =275755756a(14) =1356445199a(15) =6685794230a(16) =33010210344a(17) =163220415276a(18) =808040852871
External references
- oeis: A151154