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 A079822 #7 Dec 05 2013 19:55:59
%S A079822 4,12,104,1008,10000,100008,1000006,10000005,100000000,1000000008,
%T A079822 10000000000,100000000002,1000000000010,10000000000008,
%U A079822 100000000000000,1000000000000014,10000000000000017
%N A079822 Smallest n-digit multiple of the n-th composite number.
%t A079822 nm[{a_,b_}]:=Module[{c=Mod[10^(a-1),b]},If[c==0,10^(a-1),10^(a-1)+b-c]]; nm/@ With[{nn=25},Thread[{Range[nn],Rest[Complement[Range[ nn+ PrimePi[nn]+ 1], Prime[Range[PrimePi[nn+1]]]]]}]] (* _Harvey P. Dale_, Feb 14 2012 *)
%Y A079822 Cf. A079821.
%K A079822 base,nonn
%O A079822 1,1
%A A079822 _Amarnath Murthy_, Feb 11 2003
%E A079822 More terms from _Erich Friedman_, Aug 08 2005