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The Leonardo numbers are a sequence of numbers given by the recurrence:
Edsger W. Dijkstra[1] used them as an integral part of his smoothsort algorithm,[2] and also analyzed them in some detail.[3][4]
A Leonardo prime is a Leonardo number that's also prime.
^Dijkstra, Edsger W. Smoothsort – an alternative to sorting in situ (EWD-796a)(PDF). E.W. Dijkstra Archive. Center for American History, University of Texas at Austin. (transcription)
^"E.W.Dijkstra Archive: Smoothsort, an alternative for sorting in situ (EWD 796a)". www.cs.utexas.edu. Retrieved 2020-08-11.
^"Leonardo Number - GeeksforGeeks". www.geeksforgeeks.org. Retrieved 2022-10-08.
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