Number of permutations of order n avoiding the consecutive pattern 11'2'2.
A177472
Number of permutations of order n avoiding the consecutive pattern 11'2'2.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =18a(5) =71a(6) =322a(7) =1665a(8) =9789a(9) =64327a(10) =468914a(11) =3748920a(12) =32699022a(13) =308710917a(14) =3138821688a(15) =34186918427a(16) =397173376849
External references
- oeis: A177472