Folder containing functions from a Niven number hunting challenge, as per http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv019.cgi?read=176641.
Given an integer, use next to find the next Niven number (this works analogous to NEXTPRIME).
Given a start and end integer, use inRange to find all Niven numbers in that range.
next9 and inRange9 do the same for 9-consecutive Niven numbers. Know, though, that you may be searching for a long time.
Can you find the first 10-consecutive Niven number? (If so, let us know...)