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 A197222 #10 Mar 30 2012 17:23:02 %S A197222 2,5,7,40,47,275,597,872,3213,36215,111858,148073,704150,6485423, %T A197222 7189573,49622861,56812434,220060163,716992923,937053086,4465205267, %U A197222 9867463620,14332668887,24200132507,86933066408,111133198915,420332663153,1792463851527 %N A197222 Numerators of convergents to e - 1/e. %t A197222 Numerator[Convergents[E - 1/E, 40]] %Y A197222 Cf. A174548 (decimal), A197223 (denominators). %K A197222 nonn %O A197222 1,1 %A A197222 _T. D. Noe_, Oct 12 2011