A177673 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A177673

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

%I #5 Apr 17 2022 22:17:06

%S 1,70,34290,60635566,281746189372,2845828778331540,

%T 55049107499751379058

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

%K nonn

%O 1,2

%A _R. H. Hardin_, May 10 2010