Number of 0..7 arrays of length n with each element unequal to at least one neighbor, with new values introduced in 0..7 order.
A221458
Number of 0..7 arrays of length n with each element unequal to at least one neighbor, with new values introduced in 0..7 order.
Terms
- a(0) =0a(1) =1a(2) =2a(3) =7a(4) =25a(5) =102a(6) =456a(7) =2219a(8) =11639a(9) =65320a(10) =389533a(11) =2451393a(12) =16164044a(13) =110866328a(14) =785411383a(15) =5709898562a(16) =42358751505a(17) =319155928942
External references
- oeis: A221458