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A121107 Trajectory of 68889 under "x -> product of digits of x" map. 0

%I #6 Oct 04 2012 10:28:58

%S 68889,27648,2688,768,336,54,20,0

%N Trajectory of 68889 under "x -> product of digits of x" map.

%C This is the smallest number of persistence 7 (cf. A003001).

%H N. J. A. Sloane, <a href="http://neilsloane.com/doc/persistence.html">The persistence of a number</a>, J. Recreational Math., 6 (1973), 97-98.

%Y Cf. A003001.

%K nonn,fini,full,base

%O 1,1

%A _N. J. A. Sloane_, Aug 12 2006

%E Edited by _Charles R Greathouse IV_, Aug 06 2010

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Last modified April 12 22:48 EDT 2024. Contains 371639 sequences. (Running on oeis4.)