752180

Appears in sequences

• a(n) = number of permutations of (1,2,...,n) producible by an ordered quadruple of distinct transpositions.at n=9A253207
• Number of length n+7 0..3 arrays with at most one downstep in every 7 consecutive neighbor pairs.at n=6A258729
• Number of length n+7 0..3 arrays with at most one downstep in every n consecutive neighbor pairs.at n=6A258737