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A002477
Wonderful Demlo numbers: a(n) = ((10^(n+1)-1)/9)^2 =
A000042
^2.
(Formerly M5386 N2339)
+0
19
1, 121, 12321, 1234321, 123454321, 12345654321, 1234567654321, 123456787654321, 12345678987654321, 1234567900987654321, 123456790120987654321, 12345679012320987654321, 1234567901234320987654321
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.
AT&T Labs Research
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