OFFSET
1,2
LINKS
Robert Israel, Table of n, a(n) for n = 1..996
FORMULA
a(n) <= A093137(n). - Robert Israel, May 31 2023
EXAMPLE
a(5)^2 = 10541^2 = {11111}2681.
MAPLE
f:= proc(n) local x, k, s;
x:= (10^n-1)/9;
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..20]); # Robert Israel, May 31 2023
CROSSREFS
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