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%I #4 Oct 25 2019 13:05:08
%S 1,3,7,18,35,84,222,459,1186,2099,4731,8093,19674,49289,102408,242522,
%T 659653
%N a(0) = 1, and for n >= 0, a(n+1) = -A326936(a(n)).
%C This sequence gives the values of the ancestors of the node with value 1 in the binary tree described in sequence A326936.
%Y Cf. A326936.
%K nonn,more
%O 0,2
%A _Rémy Sigrist_, Oct 24 2019
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