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A034979
Smallest square starting with a string of n 1's.
2
1, 1156, 111556, 11115556, 111112681, 111111555556, 11111115555556, 1111111155555556, 111111111555555556, 11111111115555555556, 111111111113333185156, 11111111111122500004921, 11111111111115555555555556, 111111111111119590793871025, 11111111111111115805344390916, 11111111111111115805344390916, 111111111111111115889741773581604, 11111111111111111167337156002376484, 11111111111111111115555555555555555556, 1111111111111111111155555555555555555556
OFFSET
1,2
LINKS
FORMULA
a(n) <= A102807(n). - Robert Israel, May 31 2023
MAPLE
f:= proc(n) local x, k, s;
x:= (10^n-1)/9;
for k from 0 do
s:= ceil(sqrt(10^k*x))^2;
if s < (x+1)*10^k then return s fi
od
end proc:
map(f, [$1..20]); # Robert Israel, May 31 2023
CROSSREFS
Sequence in context: A225938 A221813 A232004 * A189279 A264271 A264089
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