536908

Appears in sequences

• Number of permutations of 1..n with all differences of elements separated by distances 1 through 4 being respectively unique.at n=15A170810
• Number T(n,k) of involutions of [n] having exactly k peaks; triangle T(n,k), n>=0, 0<=k<=max(0,floor((n-1)/2)), read by rows.at n=55A303648