Record number of steps under iterations of "map n to n - (largest prime <= n)" (A064722) until reaching the limiting value 0 or 1. Also, places where A121561 reaches a new record.
1, 2, 9, 122, 135732
1 seqfan posts
Fri Nov 21 16:57:44 CET 2008 [seqfan] Comments on A135543