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%I #15 Sep 06 2019 06:26:23
%S 2,1,1,1,4,1,2,1,2,3,4,1,8,3,4,2,4,3,2,4,4,5,6,1,6,7,4,5,6,3,2,4,4,3,
%T 10,2,2,3,6,5,4,4,6,6,4,5,6,1,2,9,10,6,4,5,8,4,4,6,6,4,8,7,4,3,6,3,6,
%U 4,12,6,4,5,14,6,8,2,4,6,2,6,8,5,4,6,12,7,6,11,16
%N Values of k in A139319.
%H Michel Marcus, <a href="/A139320/b139320.txt">Table of n, a(n) for n = 1..1000</a>
%e For A139319(10) we check: 10*1 - 1= 9, which is not coprime to A139319(4)=3. 10*2 - 1= 19, which is not coprime to A139319(5)=19. But 10*3 - 1 = 29, which is coprime to terms A139319(1) through A139319(9). So a(10) = 3.
%Y Cf. A139318, A139319.
%K nonn
%O 1,1
%A _Leroy Quet_, Apr 13 2008
%E More terms from _Michel Marcus_, Sep 05 2019
%E New name from _Felix Fröhlich_, Sep 06 2019
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