Search: id:A151653
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%I A151653
%S A151653 0,225,1424925,879018750,286691702976,73088118705987
%N A151653 Number of permutations of 6 indistinguishable copies of 1..n with exactly 
               4 adjacent element pairs in decreasing order.
%Y A151653 Sequence in context: A036428 A109688 A013757 this_sequence A077729 A077737 
               A068123
%Y A151653 Adjacent sequences: A151650 A151651 A151652 this_sequence A151654 A151655 
               A151656
%K A151653 nonn
%O A151653 1,2
%A A151653 Ron Hardin (rhhardin(AT)att.net) May 29 2009

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