Number of length n arrays x(i), i=1..n with x(i) in 0..i and no value appearing more than 5 times.
A248839
Number of length n arrays x(i), i=1..n with x(i) in 0..i and no value appearing more than 5 times.
Terms
- a(0) =2a(1) =6a(2) =24a(3) =120a(4) =720a(5) =5038a(6) =40260a(7) =361636a(8) =3606044a(9) =39517182a(10) =472002456a(11) =6102356222a(12) =84896359836
External references
- oeis: A248839