Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, down.

A177595

Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, down.

Terms

    a(0) =1a(1) =10a(2) =238a(3) =10588a(4) =779092a(5) =87126856a(6) =13960372312

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