Number of necklaces with n white beads and 7*n black beads.
A261501
Number of necklaces with n white beads and 7*n black beads.
Terms
- a(0) =1a(1) =1a(2) =8a(3) =85a(4) =1128a(5) =16451a(6) =255704a(7) =4141383a(8) =69159400a(9) =1182125128a(10) =20581159608a(11) =363704640476
External references
- oeis: A261501