A179895 a(n) = smallest number m such that m^2 has exactly n decimal digits n.

1, 1, 15, 586, 212, 22485, 68313, 278874, 623609, 3082207

Offset

0,3

Links

Table of n, a(n) for n=0..9.

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

Cf. A086935

Sequence in context: A001236 A263887 A183546 * A343074 A232291 A294834

Adjacent sequences: A179892 A179893 A179894 * A179896 A179897 A179898

Keyword

base,fini,full,nonn

Author

Zak Seidov, Jul 31 2010

Status

approved