Number of permutations p() of 1..n+9 with centered difference p(i+1)-p(i-1) < 0 exactly 8 times.

A180886

Number of permutations p() of 1..n+9 with centered difference p(i+1)-p(i-1) < 0 exactly 8 times.

Terms

    a(0) =252a(1) =38346a(2) =3560172a(3) =183346020a(4) =6866412696a(5) =200430861345

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