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 A030814 #11 Mar 15 2020 02:19:13 %S A030814 1,3,11,46,230,1382,9675,77402,696624,6966242,76628663,919543959, %T A030814 11954071471,167357000594,2510355008911,40165680142590, %U A030814 682816562424042,12290698123632756,233523264349022367,4670465286980447352 %N A030814 a(n) = floor(exp(15/23) * n!). %e A030814 15/23 = 0.65217391304347826... %e A030814 e^(15/23) = 1.91970957781434403430534711... so a(1) = 1. %e A030814 e^(15/23) * 2! = 3.83941915562868806861... so a(2) = 3. %e A030814 e^(15/23) * 3! = 11.518257466886064205832... so a(3) = 11. %t A030814 Floor[Exp[15/23] Range[20]!] (* _Harvey P. Dale_, Feb 11 2015 *) %Y A030814 Cf. A021027 (1/23). %K A030814 nonn,easy %O A030814 1,2 %A A030814 _Simon Plouffe_