Number of length n arrays x(i), i=1..n with x(i) in 0..i and no value appearing more than 7 times.
A248841
Number of length n arrays x(i), i=1..n with x(i) in 0..i and no value appearing more than 7 times.
Terms
- a(0) =2a(1) =6a(2) =24a(3) =120a(4) =720a(5) =5040a(6) =40320a(7) =362878a(8) =3628706a(9) =39913932a(10) =478928016a(11) =6225275778a(12) =87138262602
External references
- oeis: A248841