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 A152272 #4 Jul 20 2015 03:45:08 %S A152272 0,0,15,217,2493,27625,293783,3062853,31597339,323620623,3298760889, %T A152272 33507184632,339449295349,3431900910160 %N A152272 Number of 0's among the digits of all n-digit primes. %Y A152272 Cf. A130817, A152273, A152274, A152275, A152276, A152277, A152278, A152279, A152280, A152281. %K A152272 base,nonn %O A152272 1,3 %A A152272 _Jon E. Schoenfield_, Dec 01 2008 %E A152272 a(12)-a(14) from _Giovanni Resta_, Jul 20 2015