SOLUTION: 2,7,3,26,4,- what will be the next number?

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Question 817190: 2,7,3,26,4,-
what will be the next number?

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
I ran a quartic regression on the numbers and got::
f(x) = -4.5x*4 + 51x^3 - 198x^2 + 309.5x - 156
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So the 6th term = f(6) = -243
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Cheers,
Stan H.
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