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 A352532 #18 Apr 29 2022 22:39:53 %S A352532 277777788888899,277777788888989,277777788888998,277777788889889, %T A352532 277777788889898,277777788889988,277777788898889,277777788898898, %U A352532 277777788898988,277777788899888,277777788988889,277777788988898,277777788988988,277777788989888,277777788998888 %N A352532 Numbers with multiplicative persistence value 11. %C A352532 The product of the digits of each term is either 4996238671872 or 937638166841712. %C A352532 The first term that produces the product 937638166841712 is a(1178695599). %H A352532 Daniel Mondot, <a href="https://oeis.org/wiki/File:Multiplicative_Persistence_Tree.txt">Multiplicative Persistence Tree</a> %e A352532 277777788888899 -> 4996238671872 -> 438939648 -> 4478976 -> 338688 -> 27648 -> 2688 -> 768 -> 336 -> 54 -> 20 -> 0. One digit in 11 steps. %Y A352532 Cf. A003001, A014120, A046510-A046518, A352531. %K A352532 nonn,base %O A352532 1,1 %A A352532 _Daniel Mondot_, Mar 19 2022