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 A286005 #9 Jan 08 2021 10:53:27 %S A286005 29,60,91,92,141,154,185,204,217,241,254,279,285,342,403,441,473,497, %T A286005 510,528,541,572,603,622,666,697,715,753,771,779,780,811,841,873,922, %U A286005 936,954,973,1022,1047,1053,1066,1091,1122,1234,1291,1347,1404,1422,1453,1496,1561 %N A286005 Numbers n such that 7^n is the highest power of 7 dividing A240751(n). %H A286005 David A. Corneth, <a href="/A286005/b286005.txt">Table of n, a(n) for n = 1..10000</a> %Y A286005 Cf. A005187, A240751, A286003, A286004, A286006-A286010. %K A286005 nonn,easy %O A286005 1,1 %A A286005 _David A. Corneth_, May 01 2017