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(Q8761)
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subclass of
centered polygonal number
series ordinal
4
follows
centered triangular number
followed by
centered pentagonal number
0 references
defining formula
C
4
,
n
=
2
n
2
−
2
n
+
1
{\displaystyle \mathrm {C} _{4,n}=2n^{2}-2n+1}
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Sitelinks
⧼wikibase-sitelinks-mywikigroup⧽
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