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A092850
Number of primes between A092800(n) and 10^n.
2
2, 12, 81, 598, 4708, 38622, 327823, 2847315, 25163920, 225457188, 2042143752, 18663517814, 171846353051, 1592315669558, 14834375047080, 138850713196545, 1305003833233144, 12309801809090282, 116490773908518079, 1105570064097792198, 10519869248735544757, 100335959685809643520
OFFSET
1,1
FORMULA
a(n) = PrimePi(10^n) - PrimePi(A092800(n)) = PrimePi(10^n) - PrimePi(A046731(n)/A006880(n)). - Robert G. Wilson v, Jan 19 2007
a(n) = A006880(n) - A092849(n). - Amiram Eldar, Jun 14 2024
EXAMPLE
Below 10^1 there are 4 primes: 2 + 3 + 5 + 7 = 17. The rounded mean is 17/4 =~ 4. There are 2 primes > 4: 5 and 7, so a(1) = 2.
CROSSREFS
KEYWORD
nonn
AUTHOR
Enoch Haga, Mar 07 2004
EXTENSIONS
a(9)-a(13) from Robert G. Wilson v, Jan 19 2007
a(14)-a(22) from Amiram Eldar, Jun 14 2024
STATUS
approved