The negadecimal representation of a number n is its representation in base -10 (i.e., base negative 10). It is therefore given by the coefficients a_n a_(n - 1) ...a_1 a_0 in n | = | sum_(i = 0) a_i (-10)^i | = | ... + a_2 (-10)^2 + a_1 (-10)^1 + a_0 (-10)^0, where a_i = 0, 1, ..., 9.
base | decimal | negabinary
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