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 A118091 #8 Sep 02 2025 15:57:19 %S A118091 1,47,120,67,122,267,808,854,504,451,200,48,130,77,123,367,809,954, %T A118091 505,551,201,148,887,834,484,530,81,64,92,75,103,347,789,1033,3347, %U A118091 7479,9793,4025,5250,571,221,168,907,755,603,352,299,1038,8347,7484,4893 %N A118091 Start with 1 and repeatedly reverse the digits and add 46 to get the next term. %C A118091 After 422 steps enters a cycle of 90. All 90 numbers of the cycle are 4-digit numbers. %H A118091 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %t A118091 NestList[FromDigits[Reverse[IntegerDigits[#]]]+46&,1,50] (* _Harvey P. Dale_, Sep 24 2013 *) %t A118091 NestList[IntegerReverse[#]+46&,1,60] (* _Harvey P. Dale_, Sep 02 2025 *) %Y A118091 Cf. A117828, A117816, A117817. %K A118091 base,nonn,changed %O A118091 1,2 %A A118091 Luc Stevens (lms022(AT)yahoo.com), May 11 2006 %E A118091 Corrected by _Harvey P. Dale_, Sep 24 2013