Number of necklaces with n white beads and 8*n black beads.
A261502
Number of necklaces with n white beads and 8*n black beads.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =109a(4) =1641a(5) =27151a(6) =478341a(7) =8782075a(8) =166237161a(9) =3220837534a(10) =63562741159
External references
- oeis: A261502