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A123727 An example of a stereogram: a flat picture that appears three-dimensional when viewed in the correct way. 1
1, 111, 1, 111, 11211, 111, 1, 111, 11211, 1123211, 11211, 111, 1, 111, 11211, 1123211, 112343211, 1123211, 11211, 111, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
What happens after 9? - N. J. A. Sloane, Nov 18 2006
Three-dimensionally it looks like this:
...000000000000000000000000000000010000000000000000000000000000000000...
...000000000000000000000000000000111000000000000000000000000000000000...
...000000000000000000000000000000010000000000000000000000000000000000...
...000000000000000000000000000000111000000000000000000000000000000000...
...000000000000000000000000000001121100000000000000000000000000000000...
...000000000000000000000000000000111000000000000000000000000000000000...
...000000000000000000000000000000010000000000000000000000000000000000...
...000000000000000000000000000000111000000000000000000000000000000000...
...000000000000000000000000000001121100000000000000000000000000000000...
...000000000000000000000000000011232110000000000000000000000000000000...
...000000000000000000000000000001121100000000000000000000000000000000...
...000000000000000000000000000000111000000000000000000000000000000000...
...000000000000000000000000000000010000000000000000000000000000000000...
...000000000000000000000000000000111000000000000000000000000000000000...
...000000000000000000000000000001121100000000000000000000000000000000...
...000000000000000000000000000011232110000000000000000000000000000000...
...000000000000000000000000000112343211000000000000000000000000000000...
...000000000000000000000000000011232110000000000000000000000000000000...
...000000000000000000000000000001121100000000000000000000000000000000...
...000000000000000000000000000000111000000000000000000000000000000000...
...000000000000000000000000000000010000000000000000000000000000000000...
...000000000000000000000000000000111000000000000000000000000000000000...
...000000000000000000000000000001121100000000000000000000000000000000...
...000000000000000000000000000011232110000000000000000000000000000000...
...000000000000000000000000000112343211000000000000000000000000000000...
...000000000000000000000000001123454321100000000000000000000000000000...
...000000000000000000000000000112343211000000000000000000000000000000...
...000000000000000000000000000011232110000000000000000000000000000000...
...000000000000000000000000000001121100000000000000000000000000000000...
...000000000000000000000000000000111000000000000000000000000000000000...
...000000000000000000000000000000010000000000000000000000000000000000...
REFERENCES
C. Ashbacher, Smarandache Sequences, Stereograms and Series, Phoenix, 2005, pp. 70-71.
F. Smarandache, Sequences of Numbers Involved in Unsolved Problems, Hexis, Phoenix, 2006.
LINKS
Table of n, a(n) for n=1..21.
C. Ashbacher, Smarandache Sequences, Stereograms and Series.
F. Smarandache, Sequences of Numbers Involved in Unsolved Problems.
CROSSREFS
Cf. A123698.
Sequence in context: A266435 A216479 A123698 * A282915 A367813 A351059
Adjacent sequences: A123724 A123725 A123726 * A123728 A123729 A123730
KEYWORD
nonn
AUTHOR
Z. Wenpeng (wpzhang(AT)nwu.edu.cn), Nov 18 2006
STATUS
approved

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Last modified June 26 10:51 EDT 2024. Contains 373718 sequences. (Running on oeis4.)