Number of paths from (0,0) to (n,n) that always move closer to (n,n) (and do not pass (n,n) and backtrack).
A052141
Number of paths from (0,0) to (n,n) that always move closer to (n,n) (and do not pass (n,n) and backtrack).
Terms
- a(0) =1a(1) =3a(2) =26a(3) =252a(4) =2568a(5) =26928a(6) =287648a(7) =3112896a(8) =34013312a(9) =374416128a(10) =4145895936a(11) =46127840256a(12) =515268544512
External references
- oeis: A052141