

A179895


a(n) = smallest number m such that m^2 has exactly n decimal digits n.


2




OFFSET

0,3


LINKS



EXAMPLE

a(0)=1 because 1^1=1 has zero 0's
a(1)=1 because 1^1=1 has one 1's
a(8)=623609 because 623609^2=388888184881 has eight 8's
a(9)=3082207 because3082207^2=9499999990849 has nine 9's.


CROSSREFS



KEYWORD

base,fini,full,nonn


AUTHOR



STATUS

approved



