This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A072145 #11 Sep 05 2024 08:09:51 %S A072145 100000114412,100000124422,100000125522,100000126622,100000177959, %T A072145 100000192292,100000214413,100000215513,100000218813,100000221123, %U A072145 100000228823,100000248843,100000269963,100000271173,100000302204 %N A072145 Numbers k such that the period of the 'Reverse and Subtract' trajectory of k is greater than 14. %C A072145 'Reverse and Subtract' (cf. A072137) is defined by x -> |x - reverse(x)|. %C A072145 Subsequence of A072144. %e A072145 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. %Y A072145 Cf. A072137, A072140, A072142, A072143, A072144. %K A072145 base,nonn %O A072145 1,1 %A A072145 _Klaus Brockhaus_, Jun 24 2002 %E A072145 Offset corrected by _Sean A. Irvine_, Sep 04 2024