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2023 IOQM/Problem 10

Revision as of 00:58, 21 November 2023 by Sansgankrsngupta (talk | contribs)
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The sequence $\{a_n\}_{n\geq0}$ is defined by $a_0 = 1$, $a_1 = -4$, and $a_{n+2} = -4a_{n+1} - 7a_n, \text{for } n \geq 0.$ Find the number of positive integer divisors of $a_{50}^2 - a_{49}a_{51}$.

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