The life expectancy tables are an Appendix to IRS Publication 590.
This link, although dated, describes the withdrawal options in enough detail for you to set up a spreadsheet to check calculator values.
72t Rule - 72t Distribution - 72t Rule for IRA and 401k
No doubt a continuous prosperity, though spendthrift, is preferable to an economy thriftily moral, though lean. Nevertheless, that prosperity would seem more soundly shored if, by a saving grace, more of us had the grace to save.
Life Magazine editorial, 1956