Squares that remain squares if you decrease them by a repunit with the same number of digits.

A273229

Squares that remain squares if you decrease them by a repunit with the same number of digits.

Terms

    a(0) =1a(1) =36a(2) =400a(3) =3136a(4) =24336a(5) =115600a(6) =118336a(7) =126736a(8) =211600a(9) =309136a(10) =430336a(11) =577600a(12) =5973136a(13) =19713600a(14) =30869136a(15) =53582400a(16) =3086469136a(17) =4310710336a(18) =71526293136a(19) =111155560000a(20) =112104432400a(21) =113531259136a(22) =137756776336a(23) =206170483600a(24) =245996160400a(25) =262303768336a(26) =308642469136

External references