1/8 the number of permutations of 3 indistinguishable copies of 1..n with exactly 4 local maxima.

A152501

1/8 the number of permutations of 3 indistinguishable copies of 1..n with exactly 4 local maxima.

Terms

    a(0) =0a(1) =0a(2) =46a(3) =22615a(4) =5036741a(5) =819235874a(6) =114962084772

External references