What is the o'th term of -30, 15, 86, 195, 354, 575?
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What is the x'th term of -25, -28, -31?
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What is the g'th term of 427, 879, 1331?
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What is the o'th term of 43, 33, 19, 1, -21, -47, -77?
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What is the r'th term of -31, -29, -27?
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What is the l'th term of 110, 105, 104, 107, 114, 125, 140?
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What is the f'th term of -2, 4, 4, -2?
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