OK I added some checks and I think it's actually correct!

explore_120cell.js

@@ -462,5 +462,31 @@ const c5s = coherent_5cells(cell120, all5);
 
 const celli = c5s.map((c5) => [ "1", "2", "3", "4", "5" ].map((l) => c5[l]));
 
-console.log(celli);
-console.log(celli.length);
+
+// check it because I don't believe it yet
+
+const vertex_check = {};
+
+for( const c5 of celli ) {
+    for( const l in c5 ) {
+        const v = c5[l];
+        if( v in vertex_check ) {
+            console.log(`Double count vertex ${v}`);
+        }
+        vertex_check[v] = 1;
+    }
+}
+
+for( let i = 1; i < 601; i++ ) {
+    if( !vertex_check[i] ) {
+       console.log(`v ${i} missing`);
+    }
+}
+
+
+const idict = {};
+for( let i = 1; i < 121; i++ ) {
+    idict[i] = celli[i - 1];
+}
+
+console.log(JSON.stringify(idict, null, 2));