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A034982
a(n)^2 is smallest square starting with a string of n 3's.
3
6, 58, 1825, 5774, 57735, 57735, 1825742, 57735027, 182574186, 5773502692, 57735026919, 57735026919, 5773502691896, 57735026918963, 577350269189626, 5773502691896258, 57735026918962577, 577350269189625765, 5773502691896257645, 57735026918962576451, 577350269189625764509, 5773502691896257645092
OFFSET
1,1
LINKS
EXAMPLE
a(5)^2 = 57735^2 = {33333}30225.
MAPLE
f:= proc(n) local x, k, s;
x:= (10^n-1)/3;
for k from 0 do
s:= ceil(sqrt(10^k*x));
if s^2 < (x+1)*10^k then return s fi
od
end proc:
map(f, [$1..30]); # Robert Israel, May 31 2023
CROSSREFS
Cf. A034983.
Sequence in context: A366298 A337594 A274985 * A156147 A024269 A224757
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Nov 15 1998
EXTENSIONS
More terms from Francisco Salinas (franciscodesalinas(AT)hotmail.com), Dec 23 2001
STATUS
approved