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 A325735 #10 Jun 17 2019 11:54:30
%S A325735 -3,0,0,1,-4,10,-20,36,-64,120,-239,484,-946,1716,-2794,3872,-3872,1,
%T A325735 14160,-52478,143716,-345400,767976,-1613128,3226257,-6148960,
%U A325735 11119030,-18874260,29414650,-39955040,39955040,1,-151615948,575723786,-1611404740,3936821260
%N A325735 First term of n-th difference sequence of (floor(-k*e)), k >= 0.
%C A325735 Inverse binomial transform of A121384 (values negated). - _R. J. Mathar_, Jun 17 2019
%H A325735 Clark Kimberling, <a href="/A325735/b325735.txt">Table of n, a(n) for n = 1..200</a>
%t A325735 Table[First[Differences[Table[Floor[-E*n], {n, 0, 50}], n]], {n, 1, 50}]
%Y A325735 Cf. A325664.
%K A325735 easy,sign
%O A325735 1,1
%A A325735 _Clark Kimberling_, May 20 2019