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A091329

Bar coding for digits 0 through 9 in Universal Product Code (or UPC).

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

Table of n, a(n) for n=0..9.

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

Adjacent sequences: A091326 A091327 A091328 * A091330 A091331 A091332

KEYWORD

nonn,fini,full,base

AUTHOR

N. J. A. Sloane, May 06 2004

STATUS

approved

URL: https://oeis.org/A091329

⇱ A091329 - OEIS