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What number comes next 1-1-2-3-5-13-21?

Updated: 8/20/2019
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11y ago

Best Answer

The next number is -20.

The sequence appears to be the Fibonacci sequence but it is not.

One possibility is that it is the sequence generated by the polynomial:

t(n) = (-17n6 + 369n5 - 3095n4 + 12795n3 - 27128n2 + 27876n - 10080)/720 for n = 1, 2, 3, ...

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11y ago
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Q: What number comes next 1-1-2-3-5-13-21?
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