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%I A033564 #29 Oct 20 2021 21:29:40
%S A033564 1,12,1213,12131214,1213121412131215,12131214121312151213121412131216,
%T A033564 1213121412131215121312141213121612131214121312151213121412131217
%N A033564 a(n+1) = concatenation of a(n) and a(n)+1, with a(0)=1.
%C A033564 The next term is too large to be included in the DATA section. - _N. J. A. Sloane_, Oct 20 2021
%t A033564 NestList[FromDigits[Join[IntegerDigits[#],IntegerDigits[#+1]]]&,1,6] (* _Jayanta Basu_, May 20 2013 *)
%K A033564 nonn,base
%O A033564 0,2
%A A033564 Wolfgang Scheufele (ws(AT)pi3.informatik.uni-mannheim.de)

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