Number of equivalence classes of S_n under transformations of positionally and numerically adjacent elements of the form abc <--> acb <--> bac <--> cba, where a<b<c.
A212433
Number of equivalence classes of S_n under transformations of positionally and numerically adjacent elements of the form abc <--> acb <--> bac <--> cba, where a<b<c.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =13a(5) =71a(6) =470a(7) =3497a(8) =29203a(9) =271500a(10) =2786711a(11) =31322803a(12) =382794114a(13) =5054810585a(14) =71735226535
External references
- oeis: A212433