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A077506
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Smallest n-digit triangular number beginning with n.
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1
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1, 21, 300, 4005, 50086, 600060, 7003153, 80004925, 900003951, 1000006281, 11000078650, 120000270151, 1300001532378, 14000004645256, 150000007349286, 1600000000287153, 17000000065300605, 180000000300000000
(list; graph; refs; listen; history; internal format)
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