A Sequence of nondecreasing Positive Integers is Complete Iff
See also Complete Sequence
References
Brown, J. L. Jr. ``Notes on Complete Sequences of Integers.'' Amer. Math. Monthly 68, 557-560, 1961.
Honsberger, R. Mathematical Gems III. Washington, DC: Math. Assoc. Amer., pp. 123-130, 1985.