login
A112539
Half-baked Thue-Morse: at successive steps the sequence or its bit-inverted form is appended to itself.
3
1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0
OFFSET
1,1
EXAMPLE
1;
0;
1, 0;
0, 1, 0, 1;
1, 0, 1, 0, 0, 1, 0, 1;
0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0;
1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0;
0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 0...
MATHEMATICA
s = {1}; Do[s = Join[s, Mod[s + 1, 2]]; s = Join[s, s], {n, 4}]; s (* Robert G. Wilson v, Dec 22 2005 *)
PROG
s=[1 0]; loop s=[s s]; s=[s inv(s)] endloop
CROSSREFS
Cf. A112865 (as +-1), A341389 (complement).
Sequence in context: A320167 A030658 A187950 * A104104 A188467 A039983
KEYWORD
easy,nonn
AUTHOR
Alexandre Losev, Dec 15 2005
EXTENSIONS
More terms from Robert G. Wilson v, Dec 22 2005
STATUS
approved