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 A177982 #2 Mar 30 2012 18:51:06 %S A177982 14,16,18,39,100,112,114,115,116,118,120,121,122,124,125,126,270,280, %T A177982 300,320,330,334,335,336,338,339,340,342,344,345,346,348,490,500,510, %U A177982 520,540,550,556,570,580,600,620,630,640,650,660,668,669,670,672,674 %N A177982 a(n) = composite number > a(n-1) that contains the n-th composite as a substring. %C A177982 a(n) <= 10*n. %e A177982 .. comp(n): _4 _6 _8 _9 _10 _12 _14 _15 _16 _18 _20 _21 %e A177982 ..... a(n): 14 16 18 39 100 112 114 115 116 118 120 121 . %Y A177982 Cf. A169798, A144565, A177981. %K A177982 base,nonn %O A177982 1,1 %A A177982 _Reinhard Zumkeller_, May 16 2010