Thanks for “(at most)”. But for a moment I thought that a number can not be the sum of more than 49 :-) The theorem in the paper has an unfortunate wording, I

Thanks for “(at most)”. But for a moment I thought that a number can not be the sum of more than 49 :-) The theorem in the paper has an unfortunate wording, I think. Wikipedia on “additive basis” makes it clear: “In additive number theory, an additive basis is a set S of natural numbers with the property that, for some finite number k, every natural number can be expressed as a sum of k or fewer elements of S.”