An update:
https://docs.google.com/spreadsheet/pub?key=0Ara_nWKhEraVdHg1SF9UbDJOSWtfR1liVU1YTHozN2c&output=xls
I was using round instead of floor. So did I just send the crew into the deep space? Hehe.
You know, you could just click the option to make it visible with the link in GDocs. It's under the document's sharing settings.

Eh, I just calculated things based on adding up the XP required to level until it was greater than the XP generated by the test values, increasing the starting character level by one each time.
Not the most elegant solutions, but it works.

Maybe I'll make it more efficient eventually.
