A Partition of which can generate any number 1, 2, ..., .
See also Partition
References
Cohen, D. I. A. Basic Techniques of Combinatorial Theory. New York: Wiley and Sons, p. 97, 1978.
Honsberger, R. Mathematical Gems III. Washington, DC: Math. Assoc. Amer., pp. 140-143, 1985.