T(n,k)=Number of length-n 0..k arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.

A268457

T(n,k)=Number of length-n 0..k arrays with no adjacent pair x,x+1 followed at any distance by x+1,x.

Terms

    a(0) =2a(1) =3a(2) =4a(3) =4a(4) =9a(5) =7a(6) =5a(7) =16a(8) =25a(9) =11a(10) =6a(11) =25a(12) =61a(13) =67a(14) =16a(15) =7a(16) =36a(17) =121a(18) =229a(19) =176a(20) =22a(21) =8a(22) =49a(23) =211a(24) =581a(25) =852a(26) =456a(27) =29a(28) =9a(29) =64

External references