**Round(li(n) - pi(n)), where li is the logarithmic integral and pi(x) is the number of primes up to x.**

*0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3*

*5 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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