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 A078212 #5 Dec 05 2013 19:55:56 %S A078212 0,222,0,434,55,676,7157,8018,989,101210,11811,121212,130913,141814, %T A078212 152515,162816,174817,185318,191419,200220,210021,222622,23323,241724, %U A078212 254625,2626,279027,289328,292229,306230,311531,323832,330033,348334 %N A078212 Smallest multiple of the n-th prime beginning and ending in n with a(1)=a(3)=0. %Y A078212 Cf. A078208, A077209, A077210, A078211. %K A078212 base,nonn %O A078212 1,2 %A A078212 _Amarnath Murthy_, Nov 22 2002 %E A078212 More terms from _David W. Wilson_, Jan 17 2006