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A180381 Number of increasing sequences of n integers x(1),...,x(n) with values in 1..4*n such that x(j) divides x(k) iff j divides k 1

%I #4 Mar 31 2012 12:35:46

%S 4,12,53,101,471,214,803,1037,1086,369,2002,618,3093,817,277,405,1974,

%T 967,5929,3567,2876,580,5174,3300,2903,598,563,562,5866,3324,29659,

%U 23996,18102,3354,3273,3273,32515,4605,3300,3300,36659,20746,188560,135708

%N Number of increasing sequences of n integers x(1),...,x(n) with values in 1..4*n such that x(j) divides x(k) iff j divides k

%C Column 4 of A180378

%H R. H. Hardin, <a href="/A180381/b180381.txt">Table of n, a(n) for n=1..82</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Sep 01 2010

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Last modified June 4 09:12 EDT 2023. Contains 363121 sequences. (Running on oeis4.)