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 A145381 #4 Mar 30 2012 17:27:01 %S A145381 9901,99990001,999999000001,9999999900000001, %T A145381 811451682377384625400019885321, %U A145381 666809750614092756440997454321145572124297 %N A145381 Prime numbers p such that p^2 is a concatenation of decimal representations of m and m-1 for some integer m. %H A145381 Max Alekseyev. <a href="/A145381/b145381.txt">Table of n, a(n) for n = 1..96</a> %Y A145381 Prime elements of A054216. %K A145381 base,nonn %O A145381 1,1 %A A145381 _Max Alekseyev_, Oct 09 2008