A114763 a(n) = floor(sqrt(5)*10^n)^2.

4, 484, 49729, 4999696, 499969600, 49999643236, 4999995628489, 499999965341041, 49999999664599209, 4999999997764872529, 499999999955372691076, 49999999999562191467001, 4999999999996468370295001, 499999999999959886546350009, 49999999999999566363399000484

Offset: 0

Author

Amarnath Murthy, Nov 17 2005

Keywords

• nonn

Comments

Largest square < 5*10^(2n).

Examples

			a(1) = floor(sqrt(5)*10)^2 = 22^2 = 484.
		

Crossrefs

Cf. A114761, A114762.

Programs

Magma

[Floor(5^(1/2)*10^n)^2: n in [0..150]]; // Vincenzo Librandi, Feb 05 2011

Mathematica

With[{c=Sqrt[5]},(Floor[c 10^#])^2&/@Range[0,30]]  (* Harvey P. Dale, Feb 27 2011 *)

Extensions

More terms from Joshua Zucker, May 05 2006