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Number of increasing sequences of n integers x(1),...,x(n) with values in 1..2*n such that x(j) divides x(k) if j divides k
1

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

%S 2,4,11,15,48,48,113,89,78,42,106,174,359,224,189,173,369,515,1047,

%T 1562,1428,592,1205,2067,2072,894,861,862,1751,2613,5255,6994,6266,

%U 2460,2461,2462,4959,3587,3588,3589,7217,10806,21653,32459,32460,13912,27869,48261

%N Number of increasing sequences of n integers x(1),...,x(n) with values in 1..2*n such that x(j) divides x(k) if j divides k

%C Column 2 of A180383

%H R. H. Hardin, <a href="/A180384/b180384.txt">Table of n, a(n) for n=1..95</a>

%K nonn

%O 1,1

%A _R. H. Hardin_ Sep 01 2010