The first square number.

The smallest k-digit squares not containing 0:

1-digit	1 = 12	10-digit	1111155556 = 333342
2-digit	16 = 42	11-digit	11111478921 = 1054112
3-digit	121 = 112	12-digit	111111555556 = 3333342
4-digit	1156 = 342	13-digit	1111118377216 = 10540962
5-digit	11236 = 1062	14-digit	11111115555556 = 33333342
6-digit	111556 = 3342	15-digit	111111226346761 = 105409312
7-digit	1115136 = 10562	16-digit	1111111155555556 = 333333342
8-digit	11115556 = 33342	17-digit	11111112515384644 = 1054092622
9-digit	111112681 = 105412	18-digit	111111111555555556 = 3333333342

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Page of Squares : First Upload August 17, 2003 ; Last Revised May 2, 2006
by Yoshio Mimura, Kobe, Japan