What is the b'th term of 31, 65, 123, 205, 311, 441?
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What is the h'th term of 12, 30, 36, 24, -12, -78, -180, -324?
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What is the k'th term of -80, -155, -230, -305?
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What is the h'th term of 12, 30, 36, 24, -12, -78, -180, -324?
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What is the k'th term of -138, -183, -228?
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What is the l'th term of 211, 1349, 4433, 10435, 20327, 35081?
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What is the k'th term of -80, -155, -230, -305?
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What is the t'th term of 1299, 5171, 11631, 20685, 32339?
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What is the x'th term of 10, 20, 44, 88, 158?
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