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octagonal number

polygonal number
Class type of: polygonal number Q2634498

Facts

6 properties
Instance of
type of integer
Follows
heptagonal number[2]
Followed by
nonagonal number[3]
Subclass of
polygonal number[4]
Defining formula
O_{n}=3n^{2}-2n[5]
Maintained by WikiProject
WikiProject Mathematics[6]
🏷️ Also known as
en octagonal number ar عدد مثمن cs osmiúhelníkové číslo de Achteckzahl es numero octogonal es número octogonal fi Kahdeksankulmioluku fi Kahdeksankulmioluvut fr nombre octogonal hu nyolcszögszám hu 8-szögszám it numero ottagonale ja 八角数 ko 팔각수 ro număr octogonal ru восьмиугольное число sv oktogontal vi số bát giác zh 八邊形數 zh-hans 八边形数
🔖 Identifiers · 5
Freebase ID
/m/02mxdl
MathWorld ID
OctagonalNumber
Microsoft Academic ID (discontinued)
183937342
OEIS ID
A000567
ProofWiki ID
Definition:Octagonal_Number

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🔗 Connections
Examples 34
8, 19, 21, 40, 44, 65, 85, 96 +26 more
Followed by 1
nonagonal number
Followed by (predecessor) 1
nonagonal number
Follows 1
heptagonal number
Maintained by WikiProject 1
WikiProject Mathematics
Preceded by (successor) 1
heptagonal number
Subclass of 1
polygonal number
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Summary

octagonal number is a type of integer[1].

References

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

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. 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). octagonal number. Retrieved November 10, 2026, from https://4ort.xyz/entity/octagonal-number
MLA “octagonal number.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Nov. 2026, https://4ort.xyz/entity/octagonal-number.
BibTeX @misc{4ortxyz_octagonal-number_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{octagonal number}}, year = {2026}, url = {https://4ort.xyz/entity/octagonal-number}, note = {Accessed: 2026-11-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): octagonal number — https://4ort.xyz/entity/octagonal-number (retrieved 2026-11-10)

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