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 A199998 #11 Feb 16 2025 08:33:16 %S A199998 2677889,2677898,2677988,2678798,2678879,2678897,2678978,2678987, %T A199998 2679788,2679878,2679887,2687789,2687798,2687978,2687987,2688779, %U A199998 2689778,2689787,2697788,2697878,2698778,2698787,2698877,2767889,2767898,2767988,2768798,2768879,2768978 %N A199998 Composite numbers whose multiplicative persistence is 8. %C A199998 Complement of A046508 with respect to A046517. %H A199998 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MultiplicativePersistence.html">Multiplicative Persistence</a> %e A199998 2677889 -> [ 338688 ][ 27648 ][ 2688 ][ 768 ][ 336 ][ 54 ][ 20 ][ 0 ] -> one digit in eight steps. %Y A199998 Cf. A046508 (primes whose multiplicative persistence is 8). %K A199998 nonn,base %O A199998 1,1 %A A199998 _Jaroslav Krizek_, Nov 13 2011