Number of necklaces with n beads of unlabeled colors such that the numbers of beads per color are distinct.

A261531

Number of necklaces with n beads of unlabeled colors such that the numbers of beads per color are distinct.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =4a(6) =15a(7) =25a(8) =69a(9) =254a(10) =1799a(11) =4039a(12) =16828a(13) =61751a(14) =349831a(15) =3485031a(16) =10391139a(17) =49433136a(18) =240065255a(19) =1282012987a(20) =9167583734a(21) =131550812011a(22) =459677216341

External references