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%I #7 Dec 15 2017 17:37:08
%S 14,15,8,7,4,3,2,10,19,18,12,6,5,24,32,70,288,15624,44031980160
%N Least number k requiring n iterations to reach 14 using map n -> sum of largest digit of all divisors of n (A168239).
%C a(19) > 1.67*10^46. [From _Donovan Johnson_, Jul 06 2010]
%D J. Earls, "Black Hole 14," Mathematical Bliss, Pleroma Publications, 2009, pages 18-22. ASIN: B002ACVZ6O
%K base,more,nonn
%O 0,1
%A _Jason Earls_, Nov 29 2009
%E a(1) changed from 14 to 15. - _R. J. Mathar_, Mar 06 2010
%E a(18) from _Donovan Johnson_, Jul 06 2010
%E Added initial term a(0)=14. - _M. F. Hasler_, May 23 2012
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