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Leonardo number

one of a set of numbers that Dijkstra used to explain smoothsort
Thing integer_sequence Q1762428
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Leonardo number

Summary

Leonardo number is an integer sequence[1]. It draws 27 Wikipedia views per month (integer_sequence category, ranking #12 of 30).[2]

Key Facts

  • Leonardo number's instance of is recorded as integer sequence[3].
  • Leonardo number's Freebase ID is recorded as /m/03h4n15[4].
  • Leonardo number's OEIS ID is recorded as A001595[5].
  • Leonardo number's defining formula is recorded as L(n) = \begin{cases} 1 & \text{if } n = 0 \ 1 & \text{if } n = 1 \ L(n - 1) + L(n - 2) + 1 & \text{if } n > 1 \ \end{cases}[6].
  • Leonardo number's maintained by WikiProject is recorded as WikiProject Mathematics[7].
  • Leonardo number's Microsoft Academic ID is recorded as 2779066635[8].

Why It Matters

Leonardo number draws 27 Wikipedia views per month (integer_sequence category, ranking #12 of 30).[2] It has Wikipedia articles in 6 language editions, a strong signal of global cultural recognition.[9]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [3] ↑ . wikidata.org.
  2. [4] ↑ . Freebase Data Dumps. wikidata.org.
  3. [5] ↑ . wikidata.org.
  4. [6] ↑ . wikidata.org.
  5. [7] ↑ . wikidata.org.
  6. [8] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [9] ↑ . Wikidata sitelinks. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Leonardo number. Retrieved May 3, 2026, from https://4ort.xyz/entity/leonardo-number
MLA “Leonardo number.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/leonardo-number.
BibTeX @misc{4ortxyz_leonardo-number_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Leonardo number}}, year = {2026}, url = {https://4ort.xyz/entity/leonardo-number}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Leonardo number — https://4ort.xyz/entity/leonardo-number (retrieved 2026-05-03)

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