%I A104143
%S A104143 1,2,6,21,43,44,50,52,53,103,121,123,197,203,204
%N A104143 Take any three consecutive terms and write them down (in French): their 
               letters sum up to a square number. This is the slowest strictly increasing 
               such sequence.
%C A104143 Starting with "0,1" would give another sequence.
%e A104143 1 2 6 = "un+deux+six" = 9 letters; 9 is 3^2.
%e A104143 197 203 204 = "cent quatre-vingt-dix-sept + deux cent trois + deux cent 
               quatre" = 49 letters; 49 is 7^2.
%Y A104143 Sequence in context: A063753 A066893 A004192 this_sequence A088812 A001434 
               A119098
%Y A104143 Adjacent sequences: A104140 A104141 A104142 this_sequence A104144 A104145 
               A104146
%K A104143 base,easy,nonn,word
%O A104143 1,2
%A A104143 Eric Angelini (eric.angelini(AT)kntv.be), Mar 07 2005