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 A079690 #16 Nov 02 2022 10:29:12 %S A079690 0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,2,1,1,0,1,0,2,0,3,3,2,2,2,4,3,1,2, %T A079690 2,2,2,5,1,2,5,6,5,7,5,5,8,5,6,5,2,4,7,3,3,11,5,6,5,5,3,7,6,4,7,10,3, %U A079690 7,8,5,10,7,3,7,13,9,10,6,9,7,14,13,1,12,8,13,13,11,10,10,12,17,17,14,15,12 %N A079690 Number of 5's in n!. %H A079690 Seiichi Manyama, <a href="/A079690/b079690.txt">Table of n, a(n) for n = 0..10000</a> %H A079690 <a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>. %F A079690 a(n) = A034886(n) - (A027869(n) + A079680(n) + A079714(n) + A079684(n) + A079688(n) + A079691(n) + A079692(n) + A079693(n) + A079694(n)). - _Reinhard Zumkeller_, Jan 27 2008 %t A079690 DigitCount[#,10,5]&/@(Range[0,100]!) (* _Harvey P. Dale_, Sep 17 2016 *) %Y A079690 Cf. A027869, A079714. %Y A079690 Cf. A000142, A137579, A137580. %K A079690 nonn,base,easy %O A079690 0,18 %A A079690 _Cino Hilliard_, Jan 31 2003