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m robot Adding: ar:عدد متسع |
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A '''nonagonal number''' or '''enneagonal number''' is a [[
<math>\frac {7n^2 - 5n}{2}.</math>
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m robot Adding: ar:عدد متسع |
No edit summary |
||
Line 1:
A '''nonagonal number''' or '''enneagonal number''' is a [[
<math>\frac {7n^2 - 5n}{2}.</math>
| |||