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A123698 An example of a stereogram: a flat picture that appears three-dimensional when viewed in the correct way. 1
1, 111, 1, 111, 11011, 111, 1, 111, 11011, 1100011, 11011, 111, 1, 111, 11011, 1100011, 110000011, 1100011, 11011, 111, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Three-dimensionally it looks like this:

..000000000000000000000000000000010000000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000000010000000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000001101100000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000000010000000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000001101100000000000000000000000000000000...

..000000000000000000000000000011000110000000000000000000000000000000...

..000000000000000000000000000001101100000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000000010000000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000001101100000000000000000000000000000000...

..000000000000000000000000000011000110000000000000000000000000000000...

..000000000000000000000000000110000011000000000000000000000000000000...

..000000000000000000000000000011000110000000000000000000000000000000...

..000000000000000000000000000001101100000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000000010000000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000001101100000000000000000000000000000000...

..000000000000000000000000000011000110000000000000000000000000000000...

..000000000000000000000000000110000011000000000000000000000000000000...

..000000000000000000000000001100000001100000000000000000000000000000...

..000000000000000000000000000110000011000000000000000000000000000000...

..000000000000000000000000000011000110000000000000000000000000000000...

..000000000000000000000000000001101100000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000000010000000000000000000000000000000000...

..000000000000000000000000000000111000000000000000000000000000000000...

..000000000000000000000000000001101100000000000000000000000000000000...

..000000000000000000000000000011000110000000000000000000000000000000...

..000000000000000000000000000110000011000000000000000000000000000000...

..000000000000000000000000001100000001100000000000000000000000000000...

..000000000000000000000000011000000000110000000000000000000000000000...

..000000000000000000000000001100000001100000000000000000000000000000...

..000000000000000000000000000110000011000000000000000000000000000000...

..000000000000000000000000000011000110000000000000000000000000000000...

..000000000000000000000000000001101100000000000000000000000000000000...

..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. A123727.

Sequence in context: A077573 A266435 A216479 * A123727 A282915 A279800

Adjacent sequences:  A123695 A123696 A123697 * A123699 A123700 A123701

KEYWORD

nonn

AUTHOR

Z. Wenpeng (wpzhang(AT)nwu.edu.cn), Nov 18 2006

STATUS

approved

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Last modified August 12 12:15 EDT 2020. Contains 336439 sequences. (Running on oeis4.)