a(n) = smallest square m^2 such that the sum of the digits of m^2 is equal to n^2.

A067072

a(n) = smallest square m^2 such that the sum of the digits of m^2 is equal to n^2.

Terms

    a(0) =0a(1) =1a(2) =4a(3) =9a(4) =169a(5) =4489a(6) =69696a(7) =2778889a(8) =277788889a(9) =8998988769

External references