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A068117
Smallest square beginning with concatenation of first n natural numbers.
+0
1
1, 121, 12321, 1234321, 123454321, 12345654321, 1234567654321, 123456787654321, 12345678987654321, 123456789100009878664283136, 12345678910116040727447056, 12345678910111210088193915136, 1234567891011121368630088707263161
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
AT&T Labs Research
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