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