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%I A171723 #10 Aug 06 2014 16:12:50
%S A171723 0,1,2,3,4,5,6,7,8,18,18,18,18,18,18,18,18,18,28,28,28,28,28,28,28,28,
%T A171723 28,38,38,38,38,38,38,38,38,38,48,48,48,48,48,48,48,48,48,58,58,58,58,
%U A171723 58,58,58,58,58,68,68,68,68,68,68,68,68,68,78,78,78,78,78,78,78,78,78
%N A171723 a(n) = 0+1+2+...+n in lunar arithmetic in base 9 written in base 9.
%H A171723 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 A171723 <a href="/index/Di#dismal">Index entries for sequences related to dismal (or lunar) arithmetic</a>
%K A171723 nonn,base
%O A171723 0,3
%A A171723 _N. J. A. Sloane_, Oct 02 2010

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