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A034995
Smallest square starting with a string of n 9's.
2
9, 99225, 9991921, 999950884, 99999515529, 9999995824729, 999999961946176, 99999999356895225, 99999999989350756, 999999999956753113201, 99999999999470044512256, 9999999999991276338467889
OFFSET
1,1
LINKS
MAPLE
f:= proc(n) local d, q, x;
for d from n do
q:= 10^d-10^(d-n);
x:= isqrt(q);
if x^2 < q then x:= x+1 fi;
if x^2 < 10^d then return x^2 fi
od
end proc:
map(f, [$1..20]); # Robert Israel, Sep 28 2018
CROSSREFS
Cf. A034994.
Sequence in context: A014381 A185293 A281360 * A109464 A300195 A368068
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Nov 15 1998
EXTENSIONS
More terms from Hans Havermann, Jun 18 2001
STATUS
approved