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), (-1, 0, -1), (-1, 1, 1), (0, -1, 0), (1, 1, 0)}.
A149131
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), (-1, 0, -1), (-1, 1, 1), (0, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =34a(5) =105a(6) =401a(7) =1395a(8) =5404a(9) =20017a(10) =78229a(11) =301603a(12) =1191104a(13) =4713713a(14) =18827432a(15) =75824261a(16) =306120964a(17) =1247435845a(18) =5085742029a(19) =20895502425a(20) =85932971948a(21) =355308406475
External references
- oeis: A149131