Number of permutations avoiding the consecutive pattern 1234.
A117158
Number of permutations avoiding the consecutive pattern 1234.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =111a(6) =642a(7) =4326a(8) =33333a(9) =288901a(10) =2782082a(11) =29471046a(12) =340568843a(13) =4263603891a(14) =57482264322a(15) =830335952166
External references
- oeis: A117158