A175635 a(n) = smallest number m such that decimal expansion of m^2 has exactly (n+1) digits n.

0, 11, 149, 1156, 2538, 22925, 163284, 2116076, 9321378, 31622764

Offset

0,2

Links

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

Example

a(0)=0 because 0^2=0 has one 0
a(1)=1 because 11^2=121 has two 1's
a(2)=149 because 149^2=22201 has three 2's
a(8)=9321378 because 9321378^2=86888087818884 has nine 8's
a(9)=31622764 because 31622764^2=999999202999696 has ten 9's.

Crossrefs

Cf. A086935, A179895.

Sequence in context: A296143 A217722 A261536 * A103544 A038141 A307072

Adjacent sequences: A175632 A175633 A175634 * A175636 A175637 A175638

Keyword

base,fini,full,nonn

Author

Zak Seidov, Aug 01 2010

Status

approved