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A110748
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Form triangle shown below, in which the n-th row contains n terms of an arithmetic progression with first term 1 and common difference n. Then a(n) = terms of the n-th row (mod 10), concatenated.
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1, 13, 147, 1593, 16161, 173951, 1852963, 19753197, 109876543, 1111111111, 12345678901, 135791357913, 1470369258147, 15937159371593, 161616161616161, 1739517395173951, 18529630741852963, 197531975319753197
(list; graph; refs; listen; history; internal format)
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