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A217889 Number of n element 1..n arrays with each element the minimum of 6 adjacent elements of a permutation of 1..n+5 of n+5 elements 0

%I #3 Oct 14 2012 08:32:22

%S 1,3,11,45,197,903,4278,20788,103050,519268,2653278,13725388

%N Number of n element 1..n arrays with each element the minimum of 6 adjacent elements of a permutation of 1..n+5 of n+5 elements

%C Column 6 of A217891

%e Some solutions for n=4

%e ..2....2....1....1....3....4....3....1....1....4....1....2....1....3....2....4

%e ..4....2....1....3....1....2....2....1....2....3....1....3....4....3....2....2

%e ..3....2....1....4....1....2....2....1....4....1....2....1....3....1....4....1

%e ..1....1....4....2....1....1....1....1....3....1....4....1....2....1....1....1

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 14 2012

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Last modified April 26 07:58 EDT 2024. Contains 371991 sequences. (Running on oeis4.)