👉 "Septennary" is a term in mathematics, specifically related to the concept of a quadratic sequence. It refers to a sequence where each term after the first is obtained by adding a constant multiple of the previous term to the preceding term. The term "septennary" arises from the fact that it involves a sequence of 7 terms, starting with 1 and then increasing by multiples of 2 (e.g., 1, 4, 9, 16,
