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 A079694 #16 Nov 02 2022 10:29:20 %S A079694 0,0,0,0,0,0,0,0,0,0,0,2,1,0,1,0,2,1,0,0,1,3,0,1,2,2,1,1,0,4,2,1,2,2, %T A079694 5,3,7,4,1,5,5,0,4,2,2,4,6,7,3,2,2,3,3,6,4,6,6,5,6,8,6,7,6,7,5,6,6,8, %U A079694 8,7,12,5,7,5,7,10,12,7,6,9,5,12,13,12,10,9,9,10,13,18,14,12,7,7,7,15,20,16 %N A079694 Number of 9's in n!. %H A079694 Seiichi Manyama, <a href="/A079694/b079694.txt">Table of n, a(n) for n = 0..10000</a> %H A079694 <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>. %F A079694 a(n) = A034886(n) - (A027869(n) + A079680(n) + A079714(n) + A079684(n) + A079688(n) + A079690(n) + A079691(n) + A079692(n) + A079693(n)). - _Reinhard Zumkeller_, Jan 27 2008 %t A079694 DigitCount[#,10,9]&/@(Range[0,100]!) (* _Harvey P. Dale_, Dec 12 2013 *) %Y A079694 Cf. A027869, A079714. %Y A079694 Cf. A000142, A137579, A137580. %K A079694 nonn,base,easy %O A079694 0,12 %A A079694 _Cino Hilliard_, Jan 31 2003