en nth centered nonagonal number Z15470
en Function

سيمقن ڤد 00:00, 8 اڤريل 2024

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@@ باريس 28: / باريس 28: @@
         "Z8K2": "Z13518",
         "Z8K3": [
-            "Z20"
+            "Z20",
+            "Z15473"
         ],
         "Z8K4": [