The sequence S(n,n) that enumerates a certain class of lattice paths from (0,0) to (n,n).

A232969

The sequence S(n,n) that enumerates a certain class of lattice paths from (0,0) to (n,n).

Terms

    a(0) =1a(1) =6a(2) =60a(3) =675a(4) =7992a(5) =97416a(6) =1209951a(7) =15227190a(8) =193507056a(9) =2477564820a(10) =31910429520a(11) =412987306320

External references