A072145 Numbers k such that the period of the 'Reverse and Subtract' trajectory of k is greater than 14.

100000114412, 100000124422, 100000125522, 100000126622, 100000177959, 100000192292, 100000214413, 100000215513, 100000218813, 100000221123, 100000228823, 100000248843, 100000269963, 100000271173, 100000302204

Offset: 1

Author

Klaus Brockhaus, Jun 24 2002

Keywords

• base
• nonn

Comments

'Reverse and Subtract' (cf. A072137) is defined by x -> |x - reverse(x)|.

Subsequence of A072144.

Examples

			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

Cf. A072137, A072140, A072142, A072143, A072144.

Extensions

Offset corrected by Sean A. Irvine, Sep 04 2024