a(n) = least positive integer k such that sumdigits(k^2) = n*sumdigits(k).

A280012

a(n) = least positive integer k such that sumdigits(k^2) = n*sumdigits(k).

Terms

    a(0) =1a(1) =2a(2) =3a(3) =13a(4) =113a(5) =1113a(6) =11113a(7) =211113a(8) =101011113a(9) =1101111211a(10) =110101111211

External references