Number of unlabeled semiorders on n points and having dimension 3.

A293501

Number of unlabeled semiorders on n points and having dimension 3.

Terms

    a(0) =3a(1) =40a(2) =318a(3) =1974a(4) =10603a(5) =51894a(6) =238413a(7) =1047440a(8) =4454826a(9) =18496217a(10) =75416600a(11) =303287250a(12) =1206781482a(13) =4762466651a(14) =18674965709a(15) =72866587238a(16) =283217927396

External references