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), (0, -1, 1), (0, 1, 1), (1, 1, -1)}.
A148895
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), (0, -1, 1), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =31a(5) =103a(6) =394a(7) =1491a(8) =6000a(9) =23753a(10) =97516a(11) =403991a(12) =1695218a(13) =7143447a(14) =30524744a(15) =131270682a(16) =567335019a(17) =2466465890a(18) =10796808479a(19) =47437462779a(20) =209184240720a(21) =926697463398
External references
- oeis: A148895