%I #6 Jan 10 2017 19:12:14
%S 1,1,3,4,5,1,7,8,1,5,11,6,13,7,5,16,17,6,19,1,7,11,23,12,25,13,27,7,
%T 29,1,31,32,11,17,35,12,37,19,13,10,41,7,43,11,9,23,47,24,49,10,17,13,
%U 53,54,55,1,19,29,59,10,61,31,63,64,65,11,67,17,23,7,71,24,73,37,1,19,77,13,79,20,81,41,83,1,85,43,29,11,89,9,91,23,31,47,95,48,97
%N a(n) = n / A280491(n) = n / gcd(n,A122111(n)).
%H Antti Karttunen, <a href="/A280490/b280490.txt">Table of n, a(n) for n = 1..8192</a>
%F a(n) = n / A280491(n) = n / gcd(n,A122111(n)).
%o (Scheme) (define (A280490 n) (/ n (A280491 n)))
%Y Cf. A088902 (the positions of 1's).
%Y Cf. A122111, A280491, also A278520, A280488.
%K nonn
%O 1,3
%A _Antti Karttunen_, Jan 09 2017
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