Number of 0..5 arrays of length n with each element differing from at least one neighbor by 2 or more, starting with 0.

A221512

Number of 0..5 arrays of length n with each element differing from at least one neighbor by 2 or more, starting with 0.

Terms

    a(0) =0a(1) =4a(2) =13a(3) =80a(4) =381a(5) =1970a(6) =9940a(7) =50495a(8) =255980a(9) =1298632a(10) =6586395a(11) =33407907a(12) =169448914a(13) =859472004a(14) =4359369001a(15) =22111382192a(16) =112152257687a(17) =568853184739

External references