Number of permutations in S_n containing exactly 2 increasing subsequences of length 5.
A224250
Number of permutations in S_n containing exactly 2 increasing subsequences of length 5.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =5a(6) =128a(7) =2124a(8) =29445a(9) =373379a(10) =4517921a(11) =53342405a(12) =622358262a(13) =7229196009a(14) =83984283157a(15) =978558652802
External references
- oeis: A224250