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 A080017 #5 Jul 08 2017 15:01:10 %S A080017 1,1,2,3,14,31,138,997,1135,5537,12209,42164,180865,1850814,2031679, %T A080017 5914172,7945851,13860023,21805874,340948133,362754007,1429210154, %U A080017 8938014931,10367225085,19305240016,48977705117,68282945133,117260650250,185543595383,488347841016 %N A080017 Denominators of the convergents to the continued fraction of Pi^2/6. %t A080017 Denominator[Convergents[Pi^2/6,30]] (* _Harvey P. Dale_, Jul 08 2017 *) %Y A080017 Cf. A079937, A080016 (numerators). %K A080017 frac,nonn %O A080017 0,3 %A A080017 _Paul D. Hanna_, Jan 19 2003 %E A080017 More terms from _Harvey P. Dale_, Jul 08 2017