Number of equivalence classes of S_n under transformations of positionally and numerically adjacent elements of the form abc <--> acb where a<b<c.

A212580

Number of equivalence classes of S_n under transformations of positionally and numerically adjacent elements of the form abc <--> acb where a<b<c.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =20a(5) =102a(6) =626a(7) =4458a(8) =36144a(9) =328794a(10) =3316944a(11) =36755520a(12) =443828184a(13) =5800823880a(14) =81591320880

External references