A177658 - OEIS

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A177658

Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, down, down, down, up.

%I #5 Mar 02 2016 10:55:52

%S 1,1,70,34650,63063000,304028985024,3200982922029530,

%T 64736431797158097635

%N Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, down, down, down, up.

%Y Cf. A014608.

%K nonn

%O 0,3

%A _R. H. Hardin_, May 10 2010