What is the f'th term of -10, -51, -172, -415, -822?
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What is the f'th term of 291, 293, 295?
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What is the f'th term of 17, -23, -93, -193, -323?
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What is the x'th term of -8, -27, -52, -77, -96, -103, -92, -57?
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What is the t'th term of 11, 20, 29, 38, 47, 56?
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What is the f'th term of 24, 60, 120, 204?
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What is the w'th term of 199, 373, 537, 685, 811, 909, 973, 997?
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What is the b'th term of 220, 888, 2002, 3562, 5568?
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What is the d'th term of 355, 356, 357, 358, 359, 360?
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What is the l'th term of 538, 542, 544, 544, 542, 538?
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What is the q'th term of 571, 564, 557?
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What is the z'th term of -50, -96, -144, -194, -246, -300, -356?
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What is the w'th term of -34, -47, -56, -61?
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