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The Dozenal Society of America
The DSA is a voluntary, nonprofit education corporation, organized for the conduct of research and education of the public in the use of dozenal (also called duodecimal or base-twelve) in calculations, mathematics, weights and measures, and other branches of pure and applied science.

Multiplication Tables of Various Bases

Title: Multiplication Tables of Various Bases
Author: Michael deVlieger
Year: 11EX
Subject: Multiplication tables in bases (dozenal) 2-26, 28, 30, 34, and 50.

A continually-expanding set of multiplication tables for positive, integral number bases greater than 2. Bases covered (decimal notation) are 2-50 (five dozen). Last updated on 20 November 11EX.