This work presents new factual materials found in the Book of Changes, discoveries that will be of interest to: – mathematicians, because they will come into contact with: the very first regular sequence of numbers, dichotomy - the ancestor of division, summation in ancient numerical structures; – historians, because they will discover material that clarifies the sequence of origin of ancient texts; – esotericists who will learn the fundamental principles of any esoteric teaching; – the book will be useful to a wide range of readers who are interested in issues relating to the very origins of our civilization. Mathematical patterns in esotericism have been identified material of the mantic formulas of the first layer (according to Yu.K. Shchutsky) of the main text of Wen Wang’s Book of Changes and the Fu Xi sequence in the form of classical squares 8?8 and identified the area (square 4096 dodecagrams) in which Wen Wang operated by enumerating options and using simple transformations characteristic of the Ancient world. An expected sequence of manipulations was carried out, as a result of which the Book of Gua was obtained. The application of structuring into four values (by analogy with the probability distribution of 6,7,8,9, obtained during fortune telling) was revealed to several different sets of sets of dodecagrams in the square of 4096 dodecagrams of Fu Xi, and then to the structures of the Book of Gua of the Book of Changes. The book contains purely pragmatic material, with a minimum number of judgments, the opportunity to make which is left to the reader.