Number of length-n 0..7 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree").
A215227
Number of length-n 0..7 arrays connected end-around, with no sequence of L<n elements immediately followed by itself (periodic "squarefree").
Terms
- a(0) =8a(1) =56a(2) =336a(3) =2352a(4) =15120a(5) =105168a(6) =710640a(7) =4883424a(8) =33384960a(9) =228945360a(10) =1568401296a(11) =10751253072a(12) =73683206688a(13) =505043014560
External references
- oeis: A215227