A188719 Number of safe primes < 10^n.
2, 7, 25, 115, 670, 4324, 30657, 229568, 1775675, 14156112, 115500275, 960392564
Offset: 1
Keywords
Examples
a(10^2) = a(100) = #{5, 7, 11, 23, 47, 59, 83} = 7
Links
- Wikipedia, Safe prime
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.
a(10^2) = a(100) = #{5, 7, 11, 23, 47, 59, 83} = 7
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