A091329 Bar coding for digits 0 through 9 in Universal Product Code (or UPC).

3211, 2221, 2122, 1411, 1132, 1231, 1114, 1312, 1213, 3112

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