1765836

Appears in sequences

• Number of length-n permutations avoiding descent patterns aba and bab.at n=11A295974
• Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the consecutive step patterns 010 or 101, where 1=up and 0=down; triangle T(n,k), n >= 0, k = max(0, n-3), read by rows.at n=39A295987