Number of 0..4 arrays of length n with each element differing from at least one neighbor by something other than 1.
A221569
Number of 0..4 arrays of length n with each element differing from at least one neighbor by something other than 1.
Terms
- a(0) =0a(1) =17a(2) =59a(3) =289a(4) =1293a(5) =5913a(6) =26911a(7) =122621a(8) =558547a(9) =2544357a(10) =11590169a(11) =52796369a(12) =240501763a(13) =1095550873a(14) =4990531051a(15) =22733220441a(16) =103555975477a(17) =471725515497
External references
- oeis: A221569