Number of equivalence classes of S_n under transformations of positionally adjacent elements of the form abc <--> acb where a<b<c.
A210667
Number of equivalence classes of S_n under transformations of positionally adjacent elements of the form abc <--> acb where a<b<c.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =62a(6) =284a(7) =1507a(8) =9104a(9) =61766
External references
- oeis: A210667