Definition:Generalized Pentagonal Number/Definition 2/Mistake
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Source Work
1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics:
- pentagonal number
Mistake
- a figurate number of the form $n \paren {3 n \pm 1}$.
Correction
That should in fact be $\dfrac {n \paren {3 n \pm 1} } 2$.
Sources
- 1989: Ephraim J. Borowski and Jonathan M. Borwein: Dictionary of Mathematics ... (previous) ... (next): pentagonal number