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), (-1, 1, 1), (0, -1, 1), (1, 0, -1), (1, 0, 0)}.
A148888
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), (-1, 1, 1), (0, -1, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =30a(5) =104a(6) =413a(7) =1627a(8) =6738a(9) =28291a(10) =121351a(11) =527845a(12) =2325348a(13) =10350338a(14) =46493978a(15) =210439523a(16) =959042601a(17) =4396353397a(18) =20259252722a(19) =93795603600a(20) =436053315743
External references
- oeis: A148888