hard · GMAT Quant
A cyber-security protocol generates a token hash H_n defined by H_1 = 5 and H_n+1 equiv H_n + 13 pmod32 for all integers n ≥ 1. The security engine flags tokens where H_n is an odd number greater than 20.
What is the value of H_411?
- 23
- 4
- 18
- 19
- 11
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