3560172

Appears in sequences

• Number of permutations p() of 1..n+3 with centered difference p(i+1)-p(i-1) < 0 exactly twice.at n=8A180880
• Number of permutations p() of 1..n+9 with centered difference p(i+1)-p(i-1) < 0 exactly 8 times.at n=2A180886