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A114433 Last digit (the checksum) of 10-digit ISBN numbers, 10 is represented as "X". 0
9, 7, 5, 3, 1, 10, 8, 6, 4, 8, 6, 4, 2, 0, 9, 7, 5, 3, 1, 5, 3, 1, 10, 8, 6, 4, 2, 0, 9, 2, 0, 9, 7, 5, 3, 1, 10, 8, 6, 10, 8, 6, 4, 2, 0, 9, 7, 5, 3, 7, 5, 3, 1, 10, 8, 6, 4, 2, 0, 4, 2, 0, 9, 7, 5, 3, 1, 10, 8, 1, 10, 8, 6, 4, 2, 0, 9, 7, 5, 9, 7, 5, 3, 1, 10, 8, 6, 4, 2, 6, 4, 2, 0, 9, 7, 5, 3, 1, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..99.

FORMULA

The first nine digits of ten-digit ISBN numbers are assigned according to the language, publisher and book. The final digit is a checksum: 1 x the first digit, 2 x the second digit, ... 9 x the ninth digit, reduced modulo 11 and 10 is printed as "X".

CROSSREFS

Sequence in context: A237841 A109846 A096230 * A222129 A188141 A244667

Adjacent sequences:  A114430 A114431 A114432 * A114434 A114435 A114436

KEYWORD

easy,nonn,base

AUTHOR

Jud McCranie, Feb 13 2006

STATUS

approved

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Last modified October 21 14:39 EDT 2019. Contains 328301 sequences. (Running on oeis4.)