1/30 of the number of permutations of 5 indistinguishable copies of 1..n with exactly 2 local maxima.

A152509

1/30 of the number of permutations of 5 indistinguishable copies of 1..n with exactly 2 local maxima.

Terms

    a(0) =0a(1) =2a(2) =139a(3) =8036a(4) =452068a(5) =25331360a(6) =1418668912a(7) =79446252224

External references