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%I #4 Oct 14 2022 18:29:30
%S 0,4,33,0,16,516,549755813899,513,0,20,549,548,
%T 604462909948052075708555,549764202537,545,0,64,8208,
%U 13479973333575319897333507543509815336818572211270286381289293482126
%N Periodic part of continued fraction for sqrt(n), encoded by recursively interleaving the bits in the binary expansions of the repeating terms.
%C Could be made less gigantic by omitting final terms in continued fraction, which are always 2*c0.
%F a(n) = A059884(A059903(n)).
%e sqrt(3)=1+[1,2] so a(3) is encoded as:
%e .....0 0 0 0 1 -> 1
%e ....... 1 . 0 .-> 2
%e --------------
%e .....000100001 = 33.
%Y A059903, A059884, A003285.
%K base,easy,nonn
%O 1,2
%A _Marc LeBrun_, Feb 07 2001
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