Number of necklaces with n white beads and 5*n black beads.
A261499
Number of necklaces with n white beads and 5*n black beads.
Terms
- a(0) =1a(1) =1a(2) =6a(3) =46a(4) =446a(5) =4751a(6) =54132a(7) =642342a(8) =7861662a(9) =98480332a(10) =1256569506a(11) =16273981758a(12) =213378976004
External references
- oeis: A261499