What is the c'th term of -13, -10, 9, 50, 119, 222, 365, 554?
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What is the u'th term of -1517, -1510, -1501, -1490, -1477?
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What is the a'th term of 921, 915, 895, 855, 789, 691?
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What is the k'th term of -3, -18, -45, -84, -135, -198?
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What is the i'th term of 1198, 2399, 3606, 4819?
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What is the b'th term of 6, 51, 170, 399, 774, 1331?
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What is the i'th term of -26, -28, -30, -32, -34, -36?
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