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 A121027 #13 Feb 25 2024 17:35:10 %S A121027 7,70,77,147,175,217,273,287,357,371,378,427,476,497,567,574,637,672, %T A121027 679,700,707,714,721,728,735,742,749,756,763,770,777,784,791,798,847, %U A121027 875,917,973,987,1057,1071,1078,1127,1176,1197,1267,1274,1337,1372,1379 %N A121027 Multiples of 7 containing a 7 in their decimal representation. %H A121027 Paolo Xausa, <a href="/A121027/b121027.txt">Table of n, a(n) for n = 1..10000</a> %H A121027 <a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>. %F A121027 a(n) ~ 7n. - _Charles R Greathouse IV_, Feb 12 2017 %t A121027 Select[7*Range[500], MemberQ[IntegerDigits[#], 7] &] (* _Paolo Xausa_, Feb 25 2024 *) %o A121027 (PARI) is(n)=n%7==0 && setsearch(Set(digits(n)), 7) \\ _Charles R Greathouse IV_, Feb 12 2017 %Y A121027 Intersection of A008589 and A011537. %Y A121027 Cf. A121041, A011531, A121022, A121023, A121024, A121025, A121026, A121028, A121029, A121030, A121031, A121032, A121033, A121034, A121035, A121036, A121037, A121038, A121039, A121040. %K A121027 nonn,base,easy %O A121027 1,1 %A A121027 _Reinhard Zumkeller_, Jul 21 2006 %E A121027 Typo in comment fixed by _Reinhard Zumkeller_, May 01 2011