1,4
Count prime pairs below 10^n having a difference of 28
a(5)=98 because there are 98 prime gaps of 28 below 10^5
Cf. A007508 A093748 A093750.
Sequence in context: A062538 A053980 A088995 * A197474 A147539 A156276
Adjacent sequences: A093746 A093747 A093748 * A093750 A093751 A093752
nonn
Enoch Haga (Enokh(AT)comcast.net), Apr 15 2004