|
| |
|
|
A108882
|
|
Period doubling sequence starting with '1 0 1'.
|
|
0
|
|
|
|
1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,1
|
|
|
COMMENTS
|
Start with S = 1,0,1; replace S by SS and complement the last bit; iterate.
Similar to A035263 but with a different start.
|
|
|
LINKS
|
Table of n, a(n) for n=1..105.
|
|
|
MATHEMATICA
|
f[l_] := Block[{s = Flatten[{l, l}]}, s[[ -1]] = Mod[s[[ -1]] + 1, 2]; s]; Nest[f, {1, 0, 1}, 6] (from Robert G. Wilson v, Jul 16 2005)
|
|
|
PROG
|
s=[1 0 1]; loop s=concat(s, s); s(length(s))=(s(length(s))+1)modulo2 endloop
|
|
|
CROSSREFS
|
Cf. A035263.
Sequence in context: A132138 A141212 A137893 * A168002 A070829 A118175
Adjacent sequences: A108879 A108880 A108881 * A108883 A108884 A108885
|
|
|
KEYWORD
|
easy,nonn
|
|
|
AUTHOR
|
Alexandre Losev, Jul 14 2005
|
|
|
EXTENSIONS
|
More terms from Robert G. Wilson v, Jul 16 2005
|
|
|
STATUS
|
approved
|
| |
|
|
