Problem 51715. Iterate the sum of divisors and totient
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3 Comments
David Hill
on 10 May 2021
Chris,
Would you check test17. I get a repeating pattern starting at index 161 that has 36 members.
ChrisR
on 10 May 2021
Yes, I do too. Not sure what happened or why my reference solution worked. Thanks, David.
goc3
on 7 May 2022 at 14:24
An interesting and challenging problem. I feel that it should be worth more than ten points...
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