Number of ways to lace a shoe that has n pairs of eyelets such that each eyelet has at least one direct connection to the opposite side.
A078698
Number of ways to lace a shoe that has n pairs of eyelets such that each eyelet has at least one direct connection to the opposite side.
Terms
- a(0) =1a(1) =2a(2) =20a(3) =396a(4) =14976a(5) =907200a(6) =79315200a(7) =9551001600
External references
- oeis: A078698