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 A034053 #25 Feb 16 2025 08:32:37 %S A034053 6,16,23,28,32,44,47,48,61,68,74,82,84,86,116,123,128,132,144,147,148, %T A034053 161,168,174,182,184,186,213,218,224,227,228,231,238,242,244,246,264, %U A034053 267,272,276,281,282,283,288,289,298,312,321,328,344,347,368,374,377 %N A034053 Numbers with multiplicative digital root value 6. %H A034053 Harvey P. Dale, <a href="/A034053/b034053.txt">Table of n, a(n) for n = 1..1000</a> %H A034053 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/MultiplicativeDigitalRoot.html">Multiplicative Digital Root</a> %H A034053 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %t A034053 mdr6Q[n_]:=NestWhile[Times@@IntegerDigits[#]&,n,#>9&]==6; Select[Range[400],mdr6Q] (* _Harvey P. Dale_, Jul 14 2024 *) %Y A034053 Cf. A031347. %Y A034053 Cf. A034048, A002275, A034049, A034050, A034051, A034052, A034053, A034054, A034055, A034056 (numbers having multiplicative digital roots 0-9). %K A034053 nonn,base,easy %O A034053 1,1 %A A034053 _Patrick De Geest_, Sep 15 1998