Square numbers n for which sigma(n) + d(n) is also a perfect square.

A221856

Square numbers n for which sigma(n) + d(n) is also a perfect square.

Terms

    a(0) =9a(1) =16a(2) =36a(3) =278784a(4) =251381025a(5) =2390623236a(6) =240055902025a(7) =354328515025

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