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 A079821 #4 Dec 05 2013 19:55:59 %S A079821 2,12,100,1001,10010,100009,1000008,10000004,100000021,1000000011, %T A079821 10000000026,100000000011,1000000000023,10000000000005, %U A079821 100000000000043,1000000000000006,10000000000000011,100000000000000002 %N A079821 Smallest n-digit multiple of the n-th prime. %F A079821 prime(n)*ceiling(10^(n-1)/prime(n)). - _Vladeta Jovovic_, Feb 14 2003 %K A079821 base,nonn %O A079821 1,1 %A A079821 _Amarnath Murthy_, Feb 11 2003