T(n,k)=Number of length n arrays x(i), i=1..n with x(i) in 0..i and no value appearing more than k times.
A248842
T(n,k)=Number of length n arrays x(i), i=1..n with x(i) in 0..i and no value appearing more than k times.
Terms
- a(0) =2a(1) =2a(2) =4a(3) =2a(4) =6a(5) =8a(6) =2a(7) =6a(8) =22a(9) =16a(10) =2a(11) =6a(12) =24a(13) =96a(14) =32a(15) =2a(16) =6a(17) =24a(18) =118a(19) =482a(20) =64a(21) =2a(22) =6a(23) =24a(24) =120a(25) =686a(26) =2736a(27) =128a(28) =2a(29) =6
External references
- oeis: A248842