Difference between revisions of "2023 IOQM/Problem 10"
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Revision as of 01:04, 27 October 2023
The sequence hanin≥0 is defined by a0 = 1, a1 = −4 and an+2 = −4an+1 − 7an , for n ≥ 0 . Find the number of positive integer divisors of a 2 50 − a49a51
