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 A165813 #16 Jan 23 2018 16:07:21 %S A165813 1,4,14,51,216,1095,6588,46137,369120,3322107,33221100,365432133, %T A165813 4385185632,57007413255,798103785612,11971556784225,191544908547648, %U A165813 3256263445310067,58612742015581260,1113642098296043997 %N A165813 a(n) = n*(a(n-1)+3), a(0)=1. %H A165813 G. C. Greubel, <a href="/A165813/b165813.txt">Table of n, a(n) for n = 0..250</a> %F A165813 a(n) = n! + 3*floor(e*n!) - 3. - _Gary Detlefs_, Jun 06 2010 %t A165813 FoldList[#1*#2 + 3 #2 &, 1, Range[19]] (* _Robert G. Wilson v_, Jul 07 2012 *) %Y A165813 Cf. A000142, A033540, A165792. %K A165813 nonn %O A165813 0,2 %A A165813 _Philippe Deléham_, Sep 28 2009