Number of length-n 0..5 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree").
A215225
Number of length-n 0..5 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree").
Terms
- a(0) =6a(1) =30a(2) =120a(3) =600a(4) =2520a(5) =12600a(6) =57960a(7) =280560a(8) =1330560a(9) =6394680a(10) =30548760a(11) =146516040a(12) =701454000a(13) =3361690080a(14) =16104243120
External references
- oeis: A215225