Number of permutations in S_n with longest increasing subsequence of length <= 5.
A047890
Number of permutations in S_n with longest increasing subsequence of length <= 5.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =719a(7) =5003a(8) =39429a(9) =344837a(10) =3291590a(11) =33835114a(12) =370531683a(13) =4285711539a(14) =51990339068a(15) =657723056000
External references
- oeis: A047890