The Leonardo numbers are a sequence of numbers given by the recurrence:
L(n) =
\begin{cases}
1 & \mbox{if } n = 0 \\
1 & \mbox{if } n = 1 \\
L + L + 1 & \mbox{if } n > 1 \\
\end{cases}
Edsger W. Dijkstra used them as an integral part of his...
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