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An interesting recurrence (Posted on 2017-01-17) Difficulty: 3 of 5
A sequence with the recurrence f(n)=3*f(n-1)+f(n-2) starts with two 1-digit numbers. The sequence contains the 8-digit number ABCDAECD. A≠0, and A, B, C, D, and E are not necessarily distinct. Find all possible values of ABCDAECD.

No Solution Yet Submitted by Math Man    
Rating: 5.0000 (1 votes)

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A number worth looking for? | Comment 3 of 5 |
In Charlie's list I saw this entry:
2 5   28572857

This has B=E. It is a unique solution if we had been asked for a number of the form ABCDABCD.  Looking for a number of this form may be a reasonable problem, as we could take advantage of searching for multiples of 10001.

  Posted by Brian Smith on 2017-01-17 23:22:51
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