13547688

Appears in sequences

• Number of permutations p() of 1..n+5 with centered difference p(i+1)-p(i-1) < 0 exactly 4 times.at n=5A180882
• Number of permutations p() of 1..n+6 with centered difference p(i+1)-p(i-1) < 0 exactly 5 times.at n=4A180883