T(n,k)=Number of 0..k arrays of length n with each element unequal to at least one neighbor, starting with 0.

A221463

T(n,k)=Number of 0..k arrays of length n with each element unequal to at least one neighbor, starting with 0.

Terms

    a(0) =0a(1) =0a(2) =1a(3) =0a(4) =2a(5) =1a(6) =0a(7) =3a(8) =4a(9) =2a(10) =0a(11) =4a(12) =9a(13) =12a(14) =3a(15) =0a(16) =5a(17) =16a(18) =36a(19) =32a(20) =5a(21) =0a(22) =6a(23) =25a(24) =80a(25) =135a(26) =88a(27) =8a(28) =0a(29) =7

External references