What is the y'th term of 21, 1, -39, -105, -203, -339, -519, -749?
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What is the x'th term of 75, 198, 403, 690, 1059, 1510, 2043?
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What is the x'th term of 286, 575, 866, 1159, 1454, 1751, 2050?
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What is the x'th term of 75, 198, 403, 690, 1059, 1510, 2043?
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What is the m'th term of -28, -38, -48, -58, -68, -78?
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What is the b'th term of 150, 309, 468?
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What is the x'th term of 286, 575, 866, 1159, 1454, 1751, 2050?
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What is the z'th term of 411, 1648, 3709, 6594, 10303, 14836?
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What is the b'th term of -15, -35, -71, -129, -215?
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