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 A028912 #9 Jul 08 2025 18:55:35 %S A028912 2,3,5,7,11,31,32,41,43,53,61,71,73,74,76,83,91,92,95,97,98,110,211, %T A028912 310,311,322,331,332,410,421,431,433,443,511,521,530,532,533,541,610, %U A028912 631,632,641,643,653,661,710,721,722,730,731,733,743,751,752,754,755 %N A028912 Sort digits of primes into descending order (A028906), sort this sequence into ascending order (A028911), then remove duplicates. %t A028912 Take[FromDigits[Reverse[Sort[IntegerDigits[#]]]]&/@Prime[Range[200]]//Union,60] (* _Harvey P. Dale_, Mar 31 2018 *) %K A028912 nonn,base,easy %O A028912 0,1 %A A028912 _N. J. A. Sloane_ %E A028912 More terms from _Erich Friedman_.