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 A259868 #13 Jun 29 2017 17:42:25 %S A259868 1,4,24,192,1280,7680,48384,315392,1916928,11182080,72089600, %T A259868 441188352,2589982720,15863644160,97493975040,578813952000, %U A259868 3411143557120,21023026053120,125795699785728,733623363829760,4459657816965120,26839963597275136,157885776644800512 %N A259868 a(n) = n*A004141(n). %H A259868 D. W. Kammler and R. J. McGlinn, <a href="http://www.jstor.org/stable/2320150">Local conditioning of parametric forms used to approximate continuous functions</a>, Amer. Math. Monthly, 86 (1979), 841-845. %H A259868 D. W. Kammler and R. J. McGlinn, <a href="/A004141/a004141.pdf">Local conditioning of parametric forms used to approximate continuous functions</a>, Amer. Math. Monthly, 86 (1979), 841-845. [Annotated scan of page 843 only] %Y A259868 Cf. A004140. %K A259868 nonn %O A259868 1,2 %A A259868 _N. J. A. Sloane_, Jul 09 2015