Annual appeal: Please make a donation to keep the OEIS running!
Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

The Lodumo_m transformation of a sequence s(n) is defined by a(n) = smallest nonnegative integer not yet in the list a(.) such that a(n)=s(n) (mod m). [From R. J. Mathar, Apr 30 2009]