From the Autodesk App Store:
What you can expect from the Egan Sheet Sequence application:
Renumber Views On Sheets
This app renumbers views on sheets, on demand, according to a user-defined sequence. The user-defined options are: select from one of four start corners and select either a horizontal or vertical start direction.
Typical Numbering
The app will renumber all views that are placed within the margins of the titleblock on a sheet according to the currently assigned titleblock sequence.