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%I #10 Dec 12 2023 13:41:04
%S -1,22,1,1,222,222,11,11,11,11,1222,1222,1222,1222,111,211,111,211,
%T 111,211,111,211,11222,21222,11222,21222,11222,21222,11222,21222,1111,
%U 1211,2111,2211,1111,1211,2111,2211,1111,1211,2111,2211,1111,1211,2111
%N Take n-th string over {1,2} in lexicographic order and apply the Watanabe tag system {00, 0111} described in A291069 (but adapted to the alphabet {1,2}) just once.
%p See A291072.
%Y Cf. A007931, A284116, A291067, A291068, A291069.
%Y Cf. also A289673, A291072, A291073.
%K sign
%O 1,2
%A _N. J. A. Sloane_, Aug 18 2017