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.

(In reply to Why there are many solutions by Math Man)

I can't believe I missed this.   I have f(14), f(15), f(16) right here and I didn't notice they had the form. 

Posted by Jer on 2017-01-18 17:35:42