A045787 Squares with initial digit '4'.

4, 49, 400, 441, 484, 4096, 4225, 4356, 4489, 4624, 4761, 4900, 40000, 40401, 40804, 41209, 41616, 42025, 42436, 42849, 43264, 43681, 44100, 44521, 44944, 45369, 45796, 46225, 46656, 47089, 47524, 47961, 48400, 48841, 49284, 49729, 400689

Offset: 1

Author

Jeff Burch

Keywords

• nonn
• base

Crossrefs

Cf. A045858.

Cf. A045784, A045785, A045786, A045788, A045789, A045791, A045792, A045793.

Programs

Mathematica

Flatten[Table[Range[Ceiling[Sqrt[4 10^n]],Floor[Sqrt[5 10^n]]]^2, {n,5}]] (* Harvey P. Dale, Jun 15 2011 *)

Formula

a(n) = A045858(n)^2. - Michel Marcus, Sep 04 2021