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A072145
Numbers k such that the period of the 'Reverse and Subtract' trajectory of k is greater than 14.
1
100000114412, 100000124422, 100000125522, 100000126622, 100000177959, 100000192292, 100000214413, 100000215513, 100000218813, 100000221123, 100000228823, 100000248843, 100000269963, 100000271173, 100000302204
OFFSET
1,1
COMMENTS
'Reverse and Subtract' (cf. A072137) is defined by x -> |x - reverse(x)|.
Subsequence of A072144.
EXAMPLE
100000114412 -> 114410885589 -> 871177128822 -> 642355357644 -> 195601804398 -> 697806302193 -> 306602693397 -> 486793513206 -> 115521884478 and 115521884478 as a term of A072143 is the first term of the periodic part of the trajectory of 100000114412, period is 22.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Klaus Brockhaus, Jun 24 2002
EXTENSIONS
Offset corrected by Sean A. Irvine, Sep 04 2024
STATUS
approved