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Factorial basis esti djombovos systema en joteri digitoi prostistanti multiplons factorialiom. Pro exemplom, $3:3:0:1:0 = 3(4!) + 3(3!) + 1(1!)$. Visjoinos digitos delgeti esni minor ive equal djomboi josio factorialym jom prostistati. Esti relatzionaiostos sjom Lehmerove codice i permutatzionbi.

The factorial basis is a number system in which the digits represent multiples of factorials. For example, $3:4:0:1:0 = 3(4!) + 4(3!) + 1(1!)$. Each digit must be less than or equal to the number whose factorial it represents. It is related to Lehmer code and permutations.