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Arithmetic Sequenceshard
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Consider a sequence of arithmetic progressions: Row 1: 111 Row 2: 2,3,42, 3, 42,3,4 Row 3: 5,6,7,8,95, 6, 7, 8, 95,6,7,8,9 Row 4: 10,11,12,13,14,15,1610, 11, 12, 13, 14, 15, 1610,11,12,13,14,15,16 Find the sum of the elements in Row 202020.