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A119086
Numbers n such that the n-th triangular number contains only digits {0,5,9}.
+0
3
10, 34, 44, 100, 109, 1000, 10000, 10090, 10099, 31780, 100000, 1000000, 1000999, 1382685, 4255724, 10000000, 10862780, 13827219, 100000000, 100009900, 100009909, 100009955, 100009999, 100901000, 1000000000, 10000000000
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.
AT&T Labs Research
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