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Using the rule

Un = (-134n5 + 2335n4 - 15280n3 + 46295n2 - 64356n + 37020)/60 for n = 1, 2, 3, ...

the next number is -531.

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10y ago
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Q: What is the next number in the pattern 98 72 77 49 54 and 20?
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