Initial data commit

Task/Multiplication-tables/Excel/multiplication-tables-1.excel

@@ -0,0 +1,17 @@
+FNOVERHALFCARTESIANPRODUCT
+=LAMBDA(f,
+    LAMBDA(n,
+        LET(
+            ixs, SEQUENCE(n, n, 1, 1),
+
+            REM, "1-based indices.",
+            x, 1 + MOD(ixs - 1, n),
+            y, 1 + QUOTIENT(ixs - 1, n),
+
+            IF(x >= y,
+                f(x)(y),
+                ""
+            )
+        )
+    )
+)

Task/Multiplication-tables/Excel/multiplication-tables-2.excel

@@ -0,0 +1,10 @@
+MUL
+=LAMBDA(a, LAMBDA(b, a * b))
+
+
+POW
+=LAMBDA(n,
+    LAMBDA(e,
+        POWER(n, e)
+    )
+)