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A119086
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Numbers n such that the n-th triangular number contains only digits {0,5,9}.
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2
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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
(list; graph; refs; listen; history; internal format)
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