Number of 0..6 arrays of length n with each element unequal to at least one neighbor, with new values introduced in 0..6 order.
A221457
Number of 0..6 arrays of length n with each element unequal to at least one neighbor, with new values introduced in 0..6 order.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =7a(4) =25a(5) =102a(6) =456a(7) =2218a(8) =11605a(9) =64647a(10) =379349a(11) =2320555a(12) =14658240a(13) =94843284a(14) =624544847a(15) =4164947151a(16) =28025750099a(17) =189783308469
External references
- oeis: A221457