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A119038
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Numbers n such that the n-th triangular number contains only digits {0,1,4}.
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2
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1, 4, 141, 144, 286, 9055, 16795, 44944, 90598, 167579, 15100424, 29678424, 45637726, 283245880, 5291767266, 1442505046119, 45042455839799, 151069595909375, 14429213707617199, 90999011435291333
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