3987045780

Appears in sequences

• Number of permutations avoiding the consecutive pattern 3412.at n=13A113229
• Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the consecutive pattern 3412; triangle T(n,k), n>=0, 0<=k<=max(0,floor(n/2-1)), read by rows.at n=38A264319