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.
0, 0, 907, 9007, 90007, 900007, 8000009, 40000003, 700000001, 9000000001, 40000000003, 700000000009, 8000000000009, 70000000000009, 940000000000007, 9000000000000007, 70000000000000003, 200000000000000003
Offset: 1
Examples
3-digit primes with one zero are 101, 103, 107,.., 907. The largest of these is 907, which defines a(3).
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