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%I #10 Aug 06 2014 16:12:50
%S 0,1,11,11,111,111,111,111,1111,1111,1111,1111,1111,1111,1111,1111,
%T 11111,11111,11111,11111,11111,11111,11111,11111,11111,11111,11111,
%U 11111,11111,11111,11111,11111,111111,111111,111111,111111,111111
%N a(n) = 0+1+2+...+n in lunar arithmetic in base 2 written in base 2.
%H D. Applegate, M. LeBrun and N. J. A. Sloane, <a href="http://arxiv.org/abs/1107.1130">Dismal Arithmetic</a> [Note: we have now changed the name from "dismal arithmetic" to "lunar arithmetic" - the old name was too depressing]
%H <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a>
%Y Cf. A003817.
%K nonn,base
%O 0,3
%A _N. J. A. Sloane_, Oct 02 2010
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