

A168548


Least number k requiring n iterations to reach 14 using map n > sum of largest digit of all divisors of n (A168239).


0



14, 15, 8, 7, 4, 3, 2, 10, 19, 18, 12, 6, 5, 24, 32, 70, 288, 15624, 44031980160
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OFFSET

0,1


COMMENTS

a(19) > 1.67*10^46. [From Donovan Johnson, Jul 06 2010]


REFERENCES

J. Earls, "Black Hole 14," Mathematical Bliss, Pleroma Publications, 2009, pages 1822. ASIN: B002ACVZ6O


LINKS

Table of n, a(n) for n=0..18.


CROSSREFS

Sequence in context: A165835 A134913 A176169 * A004455 A142865 A089838
Adjacent sequences: A168545 A168546 A168547 * A168549 A168550 A168551


KEYWORD

base,more,nonn


AUTHOR

Jason Earls, Nov 29 2009


EXTENSIONS

a(1) changed from 14 to 15.  R. J. Mathar, Mar 06 2010
a(18) from Donovan Johnson, Jul 06 2010
Added initial term a(0)=14.  M. F. Hasler, May 23 2012


STATUS

approved



