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%I #17 Nov 15 2019 04:16:47
%S 0,2,3,8,4,4,4,6,4,3,4,3,6,6,4,9,3,5,4,2,4,4,4,4,4,4,6,4,7,3,4,2,4,4,
%T 6,64,4,4,5,5,7,4,4,6,4,100,25,4,5,4,5,6,4,17,4,6,7,6,139,5,3,4,5,5,4,
%U 4,8,4,9,5,5,17,21,5,6,4,5,4,5,7,4,5,4,4,5,7,6,5,5,5,5,6,2,4,9,5,4,20,5,4,5
%N Numbers that appear twice consecutively in the Van Eck Sequence, in order of appearance.
%C Each number appears twice consecutively in A181391.
%e The first number is zero because in A181391 the first two numbers are 0, 0.
%Y Cf. A181391.
%K nonn
%O 1,2
%A _Chandler W. Gloyd_, Oct 15 2019
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