![Find a recurrence relation for $a_n$, the number of binary strings of length $n$, which have 3 consecutive 1's. - Mathematics Stack Exchange Find a recurrence relation for $a_n$, the number of binary strings of length $n$, which have 3 consecutive 1's. - Mathematics Stack Exchange](https://i.stack.imgur.com/Yo8IJ.jpg)
Find a recurrence relation for $a_n$, the number of binary strings of length $n$, which have 3 consecutive 1's. - Mathematics Stack Exchange
![Figure 3 from The lexicographically smallest universal cycle for binary strings with minimum specified weight | Semantic Scholar Figure 3 from The lexicographically smallest universal cycle for binary strings with minimum specified weight | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/ee69e0cc4641260ed95dbc62b485da7348eff0d0/5-Figure2-1.png)
Figure 3 from The lexicographically smallest universal cycle for binary strings with minimum specified weight | Semantic Scholar
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