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.
%I A092802 #16 Jan 20 2025 03:49:51 %S A092802 7,53,510,5047,50279,501844,5012809,50094049,500720912,5005703554, %T A092802 50046261712,500382762350,5003219541311,50027458290511, %U A092802 500236958622730,5002065769284422,50018168989895296,500161047150051653,5001437349858735047,50012907314623137795,500116546694296773760 %N A092802 Mean (rounded) of composite numbers below 10^n. %C A092802 As with the primes in A092800, each succeeding term seems a close multiple of that preceding. %H A092802 Amiram Eldar, <a href="/A092802/b092802.txt">Table of n, a(n) for n = 1..26</a> %F A092802 Add composites and divide total by the count of composites below 10^n. %F A092802 a(n) = floor((10^n(10^n + 1)/2 - A046731(n) - 1)/(10^n - A006880(n) - 1)). - _Charles R Greathouse IV_, Sep 25 2008 %e A092802 a(3) = 510 because the mean of composites below 10^3 is 510.087... . %Y A092802 Cf. A092800, A092801. %K A092802 nonn %O A092802 1,1 %A A092802 _Enoch Haga_, Mar 06 2004 %E A092802 More terms from _Charles R Greathouse IV_, Sep 25 2008