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 A076865 #6 Feb 20 2017 16:00:12 %S A076865 1,0,2,5,15,40,136,429,1544,5686,22265,90714,386298,1705828,7806446, %T A076865 36899178,179843447,902128265,4650549252,24604524692,133442382601, %U A076865 741107102344,4210787843737,24454774814641,145056183186691,878136807089527 %N A076865 Inverse Euler transform of 1, 1, 3, 8, 23, ... (A050535). %H A076865 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %Y A076865 Cf. A050535, A076864-A076867. %K A076865 nonn %O A076865 0,3 %A A076865 _N. J. A. Sloane_, Nov 23 2002 %E A076865 More terms from _Alois P. Heinz_, Feb 20 2017