T(n,k)=Number of 0..k arrays of length n with each element differing from at least one neighbor by 2 or more.

A221524

T(n,k)=Number of 0..k arrays of length n with each element differing from at least one neighbor by 2 or more.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =2a(5) =0a(6) =0a(7) =6a(8) =2a(9) =0a(10) =0a(11) =12a(12) =10a(13) =4a(14) =0a(15) =0a(16) =20a(17) =30a(18) =36a(19) =6a(20) =0a(21) =0a(22) =30a(23) =68a(24) =144a(25) =94a(26) =10a(27) =0a(28) =0a(29) =42

External references