Number of length n inversion sequences avoiding the patterns 110 and 201.
A374546
Number of length n inversion sequences avoiding the patterns 110 and 201.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =103a(6) =512a(7) =2739a(8) =15464a(9) =90964a(10) =552570a(11) =3444473a(12) =21930271a(13) =142105583a(14) =934612523a(15) =6225356918a(16) =41923198109a(17) =285028459807
External references
- oeis: A374546