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 A177998 #4 Mar 31 2012 10:26:16 %S A177998 0,0,907,9007,90007,900007,8000009,40000003,700000001,9000000001, %T A177998 40000000003,700000000009,8000000000009,70000000000009, %U A177998 940000000000007,9000000000000007,70000000000000003,200000000000000003 %N A177998 The n-digit prime with the largest number of zero decimal digits, the largest of these if there are more than one. Zero if no such prime exists. %C A177998 The largest number of zero digits in the n-digit prime is n-2, because leading zeros are ignored and the last digit is >0 for primes. %e A177998 3-digit primes with one zero are 101, 103, 107,.., 907. The largest of these is 907, which defines a(3). %Y A177998 Cf. A037053, A069675, A109902. %K A177998 nonn,base %O A177998 1,3 %A A177998 _Lekraj Beedassy_, May 17 2010