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 A235642 #15 Apr 23 2014 11:15:48 %S A235642 0,9,41,919,4729,99709,485863,9424673,38074743,801763489,2097800623, %T A235642 60727302517,996224275833,3780508946331,75385758524527, %U A235642 124508045065437,4906913903735329,85296581467695669,211790234832169331,5675465116607065549 %N A235642 a(n) = prime(10^n) mod 10^n. %C A235642 Last (n+1) digits of A006988(n). %F A235642 a(n) = A004648(10^n) = A006988(n) mod 10^n. %o A235642 (PARI) a(n) = prime (10^n) % 10^n; \\ _Michel Marcus_, Apr 21 2014 %Y A235642 Cf. A004648, A006988. %K A235642 nonn %O A235642 0,2 %A A235642 _Zak Seidov_, Apr 20 2014