Number of inequivalent colorings of free pure symmetric multifunctions (with empty expressions allowed) with n positions.

A300626

Number of inequivalent colorings of free pure symmetric multifunctions (with empty expressions allowed) with n positions.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =11a(4) =43a(5) =187a(6) =872a(7) =4375a(8) =23258a(9) =130485a(10) =767348a(11) =4710715a(12) =30070205a(13) =198983975a(14) =1361361925a(15) =9607908808a(16) =69812787049a(17) =521377973359

External references