noun
: a sequence of numbers (as 3, 5, 7, 9 etc.) in which the difference between any number of the sequence and the number immediately preceding it is always the same
noun
: a sequence of numbers (as 3, 5, 7, 9 etc.) in which the difference between any number of the sequence and the number immediately preceding it is always the same
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012