Number of permutations of 2 indistinguishable copies of 1..n with exactly n local maxima.

A334775

Number of permutations of 2 indistinguishable copies of 1..n with exactly n local maxima.

Terms

    a(0) =1a(1) =3a(2) =24a(3) =339a(4) =7392a(5) =230217a(6) =9689934a(7) =529634931a(8) =36463272996

External references