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a(n) = gcd(A309639(n), A319626(n)).
3

%I #5 Dec 29 2019 19:35:15

%S 1,2,3,4,5,3,7,8,9,5,11,2,13,7,5,16,17,9,19,5,3,11,23,3,25,13,27,7,29,

%T 5,31,32,11,17,7,9,37,19,13,8,41,3,43,11,3,23,47,8,49,25,17,13,53,27,

%U 11,8,19,29,59,5,61,31,9,64,13,11,67,17,3,7,71,9,73,37,25,19,11,13,79,16,81,41,83,3,17,43,29,11,89,3

%N a(n) = gcd(A309639(n), A319626(n)).

%H Antti Karttunen, <a href="/A330741/b330741.txt">Table of n, a(n) for n = 1..65537</a>

%F a(n) = gcd(A309639(n), A319626(n)).

%F a(n) = n / A330742(n).

%o (PARI) A330741(n) = gcd(A309639(n), A319626(n));

%Y Cf. A309639, A319626, A330742, A330749.

%K nonn

%O 1,2

%A _Antti Karttunen_, Dec 29 2019