Number of permutations of order n avoiding the consecutive pattern efgh with e<f, e<h, g<f and g<h.
A177481
Number of permutations of order n avoiding the consecutive pattern efgh with e<f, e<h, g<f and g<h.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =20a(5) =80a(6) =404a(7) =2368a(8) =15488a(9) =114480a(10) =948992a(11) =8625672a(12) =85223792a(13) =913869056a(14) =10567326528a(15) =130796711016
External references
- oeis: A177481