What is the t'th term of 24, 80, 178, 330, 548?
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What is the f'th term of 92, 94, 98, 104, 112, 122?
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What is the a'th term of -55, -54, -53, -52, -51, -50?
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What is the u'th term of -34, -55, -80, -109?
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What is the z'th term of -10, -20, -30?
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What is the b'th term of -20, -31, -48, -71?
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What is the h'th term of 124, 126, 128, 130?
一个美术生