Number of necklaces with n white beads and 6*n black beads.
A261500
Number of necklaces with n white beads and 6*n black beads.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =64a(4) =735a(5) =9276a(6) =124936a(7) =1753074a(8) =25366335a(9) =375677659a(10) =5667212132a(11) =86775157140
External references
- oeis: A261500