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 A145711 #13 May 13 2013 01:49:00 %S A145711 0,0,32,264,2103,17891,155956,1379175,12374435,112213301 %N A145711 Number of primes p in the range 9 < p <= prime(10^n) that have most significant and least significant decimal digit both equal to 7. %e A145711 a(3) = 32 because there are 32 primes in the set, from p(129)=727 to p(962)=7577. %Y A145711 Cf. A145709 - A145713. %K A145711 base,hard,nonn %O A145711 1,3 %A A145711 _Enoch Haga_, Oct 16 2008 %E A145711 Edited by _N. J. A. Sloane_, Aug 16 2010, based on emails from _Charles R Greathouse IV_, _Alois P. Heinz_, R. J. Mathar and Jack Brennen (who computed a(6)). %E A145711 Offset changed to agree with A145713 by _D. S. McNeil_, Aug 29 2010 %E A145711 a(9), a(10) from _D. S. McNeil_, Aug 29 2010