👉 Cacuminal is a term in mathematics used to describe a sequence of numbers that are all multiples of a given number, starting with 2 and increasing by 1 each time. It is often used in the context of arithmetic sequences or geometric series. In an arithmetic sequence, there are always two terms (the first and the last) that are multiples of the common difference between them. In a geometric sequence, the relationship between each term and its predecessor can be described by the formula: a