en nth centered nonagonal number Z15470
fi Funktio

Versio 8. cuáŋuimáánu 2024 tme 00.00

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