When a sheet has thousands of rows, dragging the fill handle is fragile. Generate the formula once and paste it where it belongs.
For long series, formulas are easier to review, easier to repeat, and less likely to stop at the wrong row.
Avoid dragging through large sheets just to create numbered labels.
Save the prefix, count, step, and padding pattern for future worksheets.
Check the first generated rows before using the formula in Excel.
Generate the sequence pattern, inspect it, and paste it into Excel.
Set start number, row count, step, prefix, and formatting.
Use Excel 365 SEQUENCE or a legacy ROW formula.
Paste into the first target cell and let Excel generate the series.
Skip manual dragging and create the Excel sequence from inputs.