Squares that remain squares when the repunit with the same number of digits is added.

A335598

Squares that remain squares when the repunit with the same number of digits is added.

Terms

    a(0) =0a(1) =25a(2) =289a(3) =2025a(4) =13225a(5) =100489a(6) =198025a(7) =319225a(8) =466489a(9) =4862025a(10) =19758025a(11) =42471289a(12) =1975358025a(13) =3199599225a(14) =60415182025a(15) =134885049289a(16) =151192657225a(17) =197531358025a(18) =207612366025a(19) =248956092025a(20) =447136954489a(21) =588186226489

External references