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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 1, 0)}.
A151097
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), (0, 0, 1), (0, 1, -1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =43a(4) =180a(5) =774a(6) =3431a(7) =15428a(8) =70548a(9) =325431a(10) =1516925a(11) =7112596a(12) =33584632a(13) =159251552a(14) =758919860a(15) =3628089772a(16) =17408822079a(17) =83737680086a(18) =403929643759
External references
- oeis: A151097