Number of inequivalent ways to color the faces of a cube using at most n colors so that no color appears more than twice.

A282817

Number of inequivalent ways to color the faces of a cube using at most n colors so that no color appears more than twice.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =6a(4) =72a(5) =375a(6) =1320a(7) =3675a(8) =8736a(9) =18522a(10) =36000a(11) =65340a(12) =112200a(13) =184041a(14) =290472a(15) =443625a(16) =658560a(17) =953700a(18) =1351296a(19) =1877922a(20) =2565000a(21) =3449355a(22) =4573800a(23) =5987751a(24) =7747872a(25) =9918750a(26) =12573600a(27) =15795000a(28) =19675656a(29) =24319197

External references