What is the i'th term of 19, 31, 43, 55, 67?
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What is the c'th term of 17, 102, 243, 440, 693, 1002?
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What is the g'th term of -22, -60, -86, -94, -78, -32, 50, 174?
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What is the a'th term of -15, -60, -177, -402, -771, -1320, -2085, -3102?
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What is the b'th term of 8, 9, 18, 41, 84?
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What is the j'th term of -16, -8, 4, 20, 40?
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What is the h'th term of -279, -293, -311, -333, -359?
一个美术生