6866412696

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=8A180882
• Number of permutations p() of 1..n+9 with centered difference p(i+1)-p(i-1) < 0 exactly 8 times.at n=4A180886