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 A065646 #3 May 10 2013 12:44:55 %S A065646 1,1,2,3,50,103,256,615,1486,2101,39304,80709,200722,2288651,2489373, %T A065646 4778024,12045421,52959708,65005129,1093041772,3344130445,7781302662, %U A065646 34469341093,731637465615,1497744272323,607318067756430 %N A065646 Denominators of convergents to twin prime constant. %e A065646 Convergents to twin prime constant: 0,1,1/2,2/3,33/50,68/103,169/256,406/615,981/1486,1387/2101,25947/39304,... %Y A065646 Cf. A005597 (decimal expansion), A065645 (continued fraction), A065647 (numerators of convergents to twin prime constant), A062270, A062271. %K A065646 frac,nonn %O A065646 0,3 %A A065646 _Vladeta Jovovic_, Nov 08 2001