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 A166394 #14 Jun 13 2021 08:28:22 %S A166394 63,112,119,182,189,203,273,364,455,546,630,637,721,728,791,798,812, %T A166394 819,882,889,903,973,1036,1120,1127,1190,1197,1211,1218,1281,1288, %U A166394 1302,1309,1372,1379,1463,1554,1645,1736,1820,1827,1890,1897,1911,1918,1981,1988 %N A166394 Multiples of 7 whose reversal - 1 is also a multiple of 7. %H A166394 G. C. Greubel, <a href="/A166394/b166394.txt">Table of n, a(n) for n = 1..10000</a> %t A166394 Select[7 Range[5!], Divisible[FromDigits[Reverse[IntegerDigits[#]]] - 1, 7] &] (* _G. C. Greubel_, May 12 2016 *) %Y A166394 Subsequence of A008589. %K A166394 nonn,base %O A166394 1,1 %A A166394 _Claudio Meller_, Oct 13 2009