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 A077181 #5 Dec 05 2013 19:55:49 %S A077181 6,4,2469,176366841573 %N A077181 Smallest number k such that k*prime(n) is a concatenation of successive integers starting from 1. %Y A077181 Cf. A077180, A077182. %K A077181 base,nonn %O A077181 1,1 %A A077181 _Amarnath Murthy_, Nov 01 2002 %E A077181 Next term is too large to include, but may be deduced from A077182. - _Sascha Kurz_, Jan 30 2003 %E A077181 Corrected by _Sascha Kurz_, Jan 30 2003