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 A083511 #7 Jul 16 2018 12:42:06 %S A083511 11,22,121,154,352,407,704,781,1177,1276,1771,1892,2486,2629,3322, %T A083511 3487,4279,4466,5357,5566,6556,6787,7876,8129,9317,9592,10879,11176, %U A083511 12562,12881,14366,14707,16291,16654,18337,18722,20504,20911,22792,23221 %N A083511 Members of A000124 which are multiples of 11. %t A083511 Select[Accumulate[Range[0,300]]+1,Divisible[#,11]&] (* _Harvey P. Dale_, Jul 16 2018 *) %Y A083511 Cf. A000124. %K A083511 nonn %O A083511 0,1 %A A083511 _Amarnath Murthy_, May 05 2003 %E A083511 Corrected and extended by _Ray Chandler_, May 19 2003