What is the f'th term of 513, 1015, 1515, 2013, 2509, 3003?
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What is the r'th term of -1820, -3633, -5444, -7253, -9060?
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What is the k'th term of -6, -19, -58, -135, -262, -451, -714?
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What is the j'th term of 18, 15, -10, -69, -174, -337?
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What is the z'th term of -6, 0, 8, 18, 30, 44, 60?
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What is the r'th term of 635, 633, 631, 629, 627?
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What is the i'th term of 49, 47, 45, 43, 41, 39?
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What is the y'th term of 27, 24, 7, -30, -93, -188, -321, -498?
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What is the c'th term of -155, -677, -1547, -2765, -4331?
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What is the r'th term of -1820, -3633, -5444, -7253, -9060?
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What is the v'th term of -16, -77, -184, -343, -560?
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What is the a'th term of -29, -88, -195, -356, -577, -864?
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What is the k'th term of -6, -19, -58, -135, -262, -451, -714?
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What is the f'th term of 15, -20, -87, -192, -341, -540?
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What is the u'th term of 2719, 5439, 8159, 10879, 13599?
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