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 A114485 #24 Feb 16 2025 08:32:59 %S A114485 7,158,2568,35660,456574,5565709,65657059,756570556,8565705523, %T A114485 95657055186,1056570551816,11565705518103,125657055180974, %U A114485 1356570551809682,14565705518096756,155657055180967490 %N A114485 Number of decimal digits in !(10^n), where !x is the subfactorial. %C A114485 Entries where the number of digits of the subfactorial (here) is one less than the number of digits of the factorial (A061010) are indicated by A214004. [_Carl R. White_, Jun 30 2012] %H A114485 Carl R. White, <a href="/A114485/b114485.txt">Table of n, a(n) for n = 1..200</a> %H A114485 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Subfactorial.html">Subfactorial</a> %F A114485 a(n) = 10^n*(n - 1/log(10)) + n/2 + O(1). [_Arkadiusz Wesolowski_, Jan 20 2012] %Y A114485 Cf. A000166, A061010. %K A114485 nonn,base %O A114485 1,1 %A A114485 _Eric W. Weisstein_, Nov 30 2005 %E A114485 More terms from _Carl R. White_, Jun 30 2012