What is the i'th term of -472, -1687, -3704, -6517, -10120?
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What is the u'th term of -11, -13, -7, 7?
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What is the t'th term of -260, -250, -252, -272, -316, -390?
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What is the j'th term of 10, 30, 54, 82, 114, 150?
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What is the r'th term of 136, 272, 408, 544, 680, 816?
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What is the r'th term of -167, -204, -267, -362, -495, -672, -899, -1182?
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What is the i'th term of 3583, 3584, 3585, 3586, 3587?
一个美术生