%I
%S 1,2,1,2,2,1,1,2,2,1,1,2,2,1,1,2,1,2,1,2,2,1,1,2,2,1,1,2,1,2,1,2,1,2,
%T 2,1,2,1,1,2,1,2,1,2,1,2,2,1,1,2,2,1,1,2,1,2,2,1,1,2,2,1,1,2,1,2,1,2,
%U 1,2,2,1,2,1,1,2,1,2,1,2,1,2,2,1,1,2,2,1,1,2
%N [1>null]transform of threesymbol ThueMorse A026600, with 1 subtracted.
%C Old name was: a(n) = b(n)1, where b(n) = nth term of A026600 that is not a 1.
%C From _Michel Dekking_, Apr 18 2019: (Start)
%C This sequence is a morphic sequence, i.e., a lettertoletter projection of a fixed point of a morphism. Let the morphism sigma be given by
%C 1>123, 2>456, 3>345,4>612, 5>561, 6>234,
%C and let the lettertoletter map delta be given by
%C 1>1, 2>2, 3>1, 4>2, 5>2, 6>1.
%C Then (a(n)) = delta(x), where x = 1234... is a fixed point of sigma.
%C This representation can be obtained by noting that this sequence, with 1 added, can also be viewed as the [1>23, 2>23, 3>32]transform of A026600, and by doubling 1,2 and 3, renaming the resulting six letters as 1,2,3,4,5,6.
%C (End)
%Y Cf. A026605, A057215.
%K nonn
%O 1,2
%A _Clark Kimberling_
%E Name changed by _Michel Dekking_, Apr 18 2019
