👉 In mathematics, a septenary is a type of number that can be expressed as the sum of two or more consecutive positive integers. It is also known as a sum of odd numbers, and it has applications in various fields such as algebra, geometry, and number theory. For example, if we denote the first term of the sequence as \(a_1 = 2\), the second term as \(a_2 = 4\), and so on, then we can define a sept
