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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A151001
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, 0, 1), (0, -1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =38a(4) =175a(5) =808a(6) =3849a(7) =18383a(8) =88999a(9) =431862a(10) =2110755a(11) =10334433a(12) =50809851a(13) =250155363a(14) =1234791555a(15) =6101767949a(16) =30203112734a(17) =149633428158a(18) =742180468673
External references
- oeis: A151001