Squares that remain squares if you decrease them by 4 times a repunit with the same number of digits.

A273231

Squares that remain squares if you decrease them by 4 times a repunit with the same number of digits.

Terms

    a(0) =4a(1) =97344a(2) =462400a(3) =473344a(4) =506944a(5) =846400a(6) =78854400a(7) =444622240000a(8) =448417729600a(9) =454125036544a(10) =551027105344a(11) =824681934400a(12) =983984641600

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