Number of walks of length n on the square lattice that start from (0,0) and do not touch the nonpositive real axis once they have left their starting point.
A053791
Number of walks of length n on the square lattice that start from (0,0) and do not touch the nonpositive real axis once they have left their starting point.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =34a(4) =121a(5) =468a(6) =1742a(7) =6802a(8) =25841a(9) =101428a(10) =389820a(11) =1535138a(12) =5944054a(13) =23461802a(14) =91314038a(15) =361034640a(16) =1410482689a(17) =5583955632a(18) =21878361324a(19) =86703276854a(20) =340483274100
External references
- oeis: A053791