We show that for infinitely many odd integers $n$, the sum of the first $n$ nonzero Fibonacci numbers is divisible by $n$. This resolves a conjecture of Fatehizadeh and Yaqubi.
Proof of three conjectures on congruences
On a conjecture of Deutsch, Sagan, and Wilson
The Cohen-Lenstra heuristics, moments and $p^j$-ranks of some groups
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