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A186991 Number of subsets of {1, 2, ..., n} containing n and having <=7 pairwise coprime elements. 4

%I #6 Mar 30 2012 17:37:34

%S 1,2,4,4,12,4,28,16,32,12,116,16,248,48,72,112,720,64,1447,190,380,

%T 254,3444,247,2795,701,2410,784,11588,247,19472,4839,4802,3175,7300,

%U 1449,45641,6191,10520,3908,82986,2124,124554,15874,17608

%N Number of subsets of {1, 2, ..., n} containing n and having <=7 pairwise coprime elements.

%H Alois P. Heinz, <a href="/A186991/b186991.txt">Table of n, a(n) for n = 1..200</a>

%Y Column 7 of triangle A186975. Sum of A186990 and A186978.

%K nonn

%O 1,2

%A _Alois P. Heinz_, Mar 03 2011

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Last modified April 18 18:58 EDT 2024. Contains 371781 sequences. (Running on oeis4.)