

A228113


First differences of A057793.


4



5, 21, 142, 1059, 8360, 68940, 586140, 5096885, 45085903, 404203228, 3663001812, 33489858047, 308457620524, 2858876200536, 26639628764285, 249393770865090, 2344318815695001, 22116397127183516, 209317713015989446, 1986761935255798075, 18906449883376272709
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OFFSET

1,1


COMMENTS

This sequence is an approximation to the number of primes with n digits (A006879). The error in the approximation is tabulated in A228114.
Because A057793(n) = Riemann(10^n) is not defined for n=0, we set its value to zero for our purpose of defining the differences.


REFERENCES

John H. Conway and R. K. Guy, "The Book of Numbers," Copernicus, an imprint of SpringerVerlag, NY, 1996, page 144146.


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FORMULA



EXAMPLE



CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



