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If the recursive formula for the sequence is given by a_n = a_n-1 + 10, with a_1 = 15, it means that each term in the sequence is obtained by adding 10 to the previous term.
Therefore, the recursive formula for the sequence {a_n} = {15, 26, 37, 48, 59, ...} would be:
a_1 = 15
a_n = a_n-1 + 10