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A114763
a(n) = floor(sqrt(5)*10^n)^2.
10
4, 484, 49729, 4999696, 499969600, 49999643236, 4999995628489, 499999965341041, 49999999664599209, 4999999997764872529, 499999999955372691076, 49999999999562191467001, 4999999999996468370295001, 499999999999959886546350009, 49999999999999566363399000484
OFFSET
0,1
COMMENTS
Largest square < 5*10^(2n).
EXAMPLE
a(1) = floor(sqrt(5)*10)^2 = 22^2 = 484.
MATHEMATICA
With[{c=Sqrt[5]}, (Floor[c 10^#])^2&/@Range[0, 30]] (* Harvey P. Dale, Feb 27 2011 *)
PROG
(Magma) [Floor(5^(1/2)*10^n)^2: n in [0..150]]; // Vincenzo Librandi, Feb 05 2011
CROSSREFS
Sequence in context: A058442 A221242 A075411 * A069500 A053953 A024058
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Nov 17 2005
EXTENSIONS
More terms from Joshua Zucker, May 05 2006
STATUS
approved