Number of length-n 0..6 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree").
A215226
Number of length-n 0..6 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree").
Terms
- a(0) =7a(1) =42a(2) =210a(3) =1260a(4) =6720a(5) =40110a(6) =228480a(7) =1338120a(8) =7761600a(9) =45291120a(10) =263674950a(11) =1537291560
External references
- oeis: A215226