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A119187
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Numbers n such that the n-th triangular number contains only digits {3,5,6}.
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2
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2, 3, 8, 10, 11, 36, 85, 103, 105, 114, 816, 2696, 3363, 8430, 10617, 10645, 11257, 36211, 327210, 333657, 1032989, 1054071, 3647836, 33336636, 265918617, 36148757471, 259095941942, 326605681382, 1063536896742, 3333666251008
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