154758

Appears in sequences

• The number of permutations of length n sortable by 3 reversals.at n=12A228397
• Number of iterations before a repeated value, or -1 if this never occurs, when starting at k = 1 and repeating k = k*n if k does not contain any adjacent equal digits, else k = k with all adjacent equal digits replaced by a single copy of the same digit.at n=33A368940