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(Q8760)
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Statements
subclass of
centered polygonal number
series ordinal
3
followed by
centered square number
0 references
defining formula
C
3
,
n
=
3
2
n
(
n
−
1
)
+
1
=
3
n
2
−
3
n
+
2
2
{\displaystyle C_{3,n}={\frac {3}{2}}n(n-1)+1={{3n^{2}-3n+2} \over 2}}
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Sitelinks
⧼wikibase-sitelinks-mywikigroup⧽
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