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A091329 Bar coding for digits 0 through 9 in Universal Product Code (or UPC). 0
3211, 2221, 2122, 1411, 1132, 1231, 1114, 1312, 1213, 3112 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
These are compositions of 7 into 4 parts, but otherwise seem quite random.
LINKS
How Stuff Works, How UPC Bar Codes Work
EXAMPLE
Zero is 3211, which means either a white bar of width 3, a black bar of width 2, a white bar of width 1 and a black bar of width 1; or black bar of width 3, a white bar of width 2, a black bar of width 1 and a white bar of width 1.
CROSSREFS
Sequence in context: A232262 A048255 A303995 * A261241 A345772 A020414
KEYWORD
nonn,fini,full,base
AUTHOR
N. J. A. Sloane, May 06 2004
STATUS
approved

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Last modified July 12 10:18 EDT 2024. Contains 374244 sequences. (Running on oeis4.)