T(n,k)=Number of 0..k arrays of length n with each element differing from at least one neighbor by 2 or more, starting with 0.
A221515
T(n,k)=Number of 0..k 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) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =2a(8) =1a(9) =0a(10) =0a(11) =3a(12) =3a(13) =2a(14) =0a(15) =0a(16) =4a(17) =7a(18) =12a(19) =3a(20) =0a(21) =0a(22) =5a(23) =13a(24) =36a(25) =30a(26) =5a(27) =0a(28) =0a(29) =6
External references
- oeis: A221515